Gemstone Treatment Guide

Gemstone treatments that QVC knowingly accepts.

QVC makes every effort to ensure that all items we sell meet our strict quality standards. The chart below represents those gemstone treatments that QVC knowingly accepts.

Although there are a number of temporary treatments Commonly allowed by the jewelry industry, QVC, with the exception of emeralds which are treated with a colorless oil, accepts only those treatments that are either permanent or stable.

To quickly find information on a specific gemstone, click the appropriate link below. Your page will "jump" to the top of that section.

A - B

C - E

G - J

L - O

P - R

S

T - Z

Gemstone	Enhancement method	Purpose	Frequency used	Stability	Special care
Agate (also see onyx)	Treatment Free				Normal. Click here for cleaning and care instructions.
	Dyed	To alter color	Usually	Excellent to Good	Normal. Certain stones may fade in heat or light.
	Heated	To alter color	Usually	Excellent to Good	Normal. Click here for cleaning and care instructions.
Patterned Agate (Crazy Agate)	None				Normal. Certain stones may fade in heat or light.
Patterned Agate (Crazy Agate)	Dyed	To alter color	Usually	Excellent to Good	Normal. Click here for cleaning and care instructions.
Blue Lace Agate	None				Normal. Certain stones may fade in heat or light.
Alexandrite (Also see Chrysoberyl)	None				Normal. Click here for cleaning and care instructions.
Amazonite	None				Avoid heat, chemicals & ultrasonic cleaners
Amazonite	Luster Enhanced	To improve overall appearance	Often	Very Good	Avoid heat, chemicals, & ultrasonic cleaners
Amber, Yellow Golden Brown to Reddish Brown and Orange	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Heated	To improve appearance, add "sun spangles" & deepen color	Commonly	Very Good to Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Heated w/ Oils and Pressure	To alter color	Commonly	Very Good to Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Heated w/Pressure	To alter color	Commonly	Very Good to Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
• Amber Doublet, Green	Assembled Product: Golden amber on a black base	To create the green color	Always	Very Good to Good	Special care required. Avoid abrasives.
Amethyst	None				Normal. Some un-heated material may fade with long exposure to sunlight.
	Heated	To lighten and /or remove color	Commonly	Excellent	Normal. Click here for cleaning and care instructions.
	Irradiated	To deepen and /or remove color	Commonly	Excellent	Normal. Click here for cleaning and care instructions.
Ametrine	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Unknown	Excellent	Normal. Click here for cleaning and care instructions.
	Irradiated	To alter color	Unknown	Excellent	Normal. Click here for cleaning and care instructions.
Ammolite	None				Avoid ROUGH WEAR, heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Ammolite	Coated	To increase durability	Usually	Good	Avoid ROUGH WEAR, heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Doublet (Assembled Product)	Coated	To increase durability	Always	Good to Fair	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Triplet (Assembled Product)	Impregnated with colorless, hardened substances	To increase durability	Always	Good to Fair	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Andalusite	None				Normal. Click here for cleaning and care instructions.
Apatite	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Apatite - Beads and Cabochons	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Apatite - Beads and Cabochons	Luster Enhanced	To improve appearance & clarity	Often	Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Aquamarine, Blue to Green Beryl	None				Normal. Click here for cleaning and care instructions.
Aquamarine, Blue to Green Beryl	Heated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
Aquamarine, Beads and Cabochons	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Often	Good	Normal. Click here for cleaning and care instructions.
	Luster Enhanced	To improve appearance & clarity	Often	Good	Avoid heat chemicals & ultrasonic cleaning.
Aventurine, Green	None				Normal. Click here for cleaning and care instructions.
Beryl, Milky Aqua	None				Normal. Click here for cleaning and care instructions.
	Heated				Normal. Click here for cleaning and care instructions.
	Luster Enhanced				Normal. Click here for cleaning and care instructions.
Pink (Morganite)	Heated	Eliminate yellow overtones	Commonly	Excellent	Normal. Click here for cleaning and care instructions.
Pink (Morganite)	Irradiated	To alter color	Unknown	Excellent	Normal. Click here for cleaning and care instructions.
• Yellow-Green	None				Normal. Click here for cleaning and care instructions.
• Yellow-Green	Irradiated	To alter color	Unknown	Excellent	Normal. Click here for cleaning and care instructions.
• Blue or Blue-Green	See Aquamarine				Normal. Click here for cleaning and care instructions.
• Colorless (Goshenite)	None				Normal. Click here for cleaning and care instructions.
• Colorless (Goshenite)	Heated	To eliminate tints of color	Unknown	Excellent	Normal. Click here for cleaning and care instructions.
Calcite	None				Avoid sudden temperature changes and harsh chemicals.
	Dyed	To alter color	Commonly	Very Good to Good	Avoid sudden temperature changes and harsh chemicals.
	Impregnated	To improve overall appearance and color	Commonly	Very Good to Good	Avoid sudden temperature changes and harsh chemicals.
	Luster Enhancement	To improve overall appearance	Commonly	Good	Avoid sudden temperature changes and harsh chemicals.
Carnelian					Normal. Click here for cleaning and care instructions.
• Orange to Orange-Brown Chalcedony	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Usually	Excellent to Good	Normal. Certain stones may fade in heat or light.
	Dyed	To alter color	Commonly	Excellent to Good	Normal. Certain stones may fade in heat or light.
Chalcedony (often called agate or onyx)	None				Normal. Click here for cleaning and care instructions.
	Dyed	To alter color	Usually	Excellent to Good	Certain stones may fade in heat or light.
	Heated	To alter color	Usually	Excellent to Good	Normal. Click here for cleaning and care instructions.
Chrome Diopside (Green)	None				Avoid sudden temperature changes & harsh chemicals.
Chrysoberyl • Alexandrite • Cat's -Eye Chrysoberyl • Transparent green, yellow, brown	None, for all varieties listed				Normal for all varieties listed. Click here for cleaning and care instructions.
Chrysoprase	None				Normal. Click here for cleaning and care instructions.
Chrysoprase	Impregnated with colorless resin				Normal. Click here for cleaning and care instructions.
Chrysolla • Chrysolla in Chalcedony • Chrysocolla in Quartz • Chrysocolla and Malachite: See Rock	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
	Impregnated with colorless plastic				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Citrine	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
	Irradiated	To alter color	Unknown	Excellent	Normal. Click here for cleaning and care instructions.
Coral					Avoid chemicals, cosmetics & ultrasonic cleaners.
• Black	None				Avoid chemicals, cosmetics & ultrasonic cleaners.
• White	None				Avoid chemicals, cosmetics & ultrasonic cleaners.
• White	Bleached	To alter color	Commonly	Good	Avoid chemicals, cosmetics & ultrasonic cleaners. May discolor over time.
• Pink, Orange, Red, Blue	None				Avoid chemicals and ultrasonic cleaners.
	Dyed	To alter color	Commonly	Good	Avoid chemicals and ultrasonic cleaners.
	Inpregnated with colorless wax	To improve quality of coral for shaping and polishing	Unknown	Good to Fair	Avoid chemicals and ultrasonic cleaners.
	Impregnated with plastic	To improve quality of coral for shaping and polishing	Commonly	Good	Avoid chemicals and ultrasonic cleaners.
	Luster Enhancement	To improvre overall appearance	Unknown	Good	Avoid chemicals and ultrasonic cleaners.
• Gold	Bleached from black coral	To create a color	Usually	Very Good	Avoid chemicals & ultrasonic cleaners.
Coral, Sponge	None				Avoid chemicals and ultrasonic cleaners.
	Dyed	To alter color	Commonly	Good	Avoid chemicals and ultrasonic cleaners.
	Impregnated with plastic	To improve quality of coral for shaping and polishing	Commonly	Very Good	Avoid chemicals and ultrasonic cleaners.
Cubic Zirconia
• Colorless, colored	None				Normal. Click here for cleaning and care instructions.
Danburite	None				Avoid temperature changes, steaming, chemicals and ultrasonic cleaners
Danburite	Heated	To alter color	Unknown	Excellent	Avoid temperature changes, steaming, chemicals and ultrasonic cleaners
Diamond
• (Natural), Natural Color – white, champagne	QVC does not knowingly accept treatments of any kind for natural color diamonds.				Normal. Click here for cleaning and care instructions.
• (Natural), Treated color - yellow, green, blue, pink, green, and fancy hues	Irradiation, Heat and High Temperature High Pressure. These are the only color treatments that QVC knowingly accepts.	To create color	Always	Excellent	Normal. Click here for cleaning and care instructions.
• Black	Heated	To alter color	Always	Excellent	Normal. Click here for cleaning and care instructions.
Dolomite	None				Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
	Dyed	To create color	Occasionally	Good to Very Good	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
	Impregnated	To improve durability & appearance	Occasionally	Good to Very Good	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
Drusy (Drusy Quartz)	None				Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
	Dyed	To create color	Occasionally	Very Good to Excellent	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
	Plated	To create color	Occasionally	Very Good to Excellent	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
	Vapor Deposition	To create color	Occasionally	Very Good to Excellent	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
	Vapor Deposition Coating	To create color	Occasionally	Very Good to Excellent	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
Dumortierite (Dumortierite in Quartz)	None				Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
Emerald	None				Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
Emerald	Oiling (QVC knowingly accepts only colorless oil for emeralds.)	To improve clarity and appearance	Usually	Fair to Good	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
Fluorite	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Heated	To improve appearance	Unknown	Fair to Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Irradiated	To improve appearance	Unknown	Fair to Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Fluorite Beads and Cabochons	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Heated	To improve appearance	Unknown	Fair to Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Irradiated	To improve appearance	Unknown	Fair to Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Garnet •Almandite •Demantoid •Grossularite •Pyrope •Rhodolite •Spessartite •Tsavorite	None for all varieties listed.				Avoid sudden temperature change (for all garnets listed).
Hematite	None				Normal. Click here for cleaning and care instructions.
Howlite, White	None				Avoid chemicals and ultrasonic cleaners.
• Other Colors	Dyed	To alter color	Always	Very Good to Good	Avoid chemicals and ultrasonic cleaners.
Iolite	None				Normal. Click here for cleaning and care instructions.
• Beads and Cabochons	Luster Enhancement
• Jade, Jadeite					Avoid ultrasonic cleaners.
• QVC’s Chinese Jade	None				Avoid ultrasonic cleaners.
•Pink •Blue •Yellow •Green •Lavendar •Orange •White	None				Avoid ultrasonic cleaners.
	Bleached with acid, dyed and impregnated with resin/polymer	To alter color	Commonly	Good	Avoid prolonged strong light, chemicals, and ultrasonic cleaners. May discolor over time.
	Impregnated with colorless wax	To improve appearance	Commonly	Good	Avoid ultrasonic cleaners.
	Dyed and Impregnated	To alter color	Commonly	Good	Avoid prolonged strong light, chemicals, and ultrasonic cleaners. May discolor over time.
	Luster Enhancement	To improve appearance	Commonly	Good	Avoid ultrasonic cleaners.
Jade, Nephrite	None				Avoid ultrasonic cleaners.
	Dyed	To alter color	Commonly	Very Good to Good	Avoid chemicals, ultrasonic cleaners & strong light.
	Impregnated	To improve surface texture	Commonly	Very Good to Good	Avoid chemicals, ultrasonic cleaners & strong light.
	Luster Enhancement
Jasper (All varieties regardless of color or patterning)	None				Normal. Click here for cleaning and care instructions.
	Dyed	To alter or enhance color	Occasionally	Excellent	Normal. Click here for cleaning and care instructions.
Jet	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Kyanite	None				Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
Kyanite	Heated	To alter color	Unknown	Good	Avoid temperature changes, steaming, chemicals & ultrasonic cleaners.
•Beads and Cabochons	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Often	Good	Normal. Click here for cleaning and care instructions.
	Luster Enhancement
Labradorite	None				Avoid ultrasonic cleaners.
• Sunstone	None				Avoid heat & ultrasonic cleaners
• Sunstone Beads and Caobochons	None				Avoid heat & ultrasonic cleaners
• Sunstone Beads and Caobochons	Luster Enhancement				Avoid heat & ultrasonic cleaners
Lapis Lazuli	None				Avoid chemicals and ultrasonic cleaners.
	Dyed	To provide color or uniformity of color or color durability	Commonly	Variable	Avoid chemicals and ultrasonic cleaners.
	Impregnated with colorless resin	To provide color or uniformity of color or color durability	Commonly	Variable	Avoid chemicals and ultrasonic cleaners.
	Luster Enhancement				Avoid chemicals and ultrasonic cleaners.
• Denim Lapis	None				Avoid chemicals and ultrasonic cleaners.
	Dyed	To provide color or uniformity of color or color durability	Commonly	Variable	Avoid chemicals and ultrasonic cleaners.
	Impregnated	To provide durability	Occasionally		Avoid chemicals and ultrasonic cleaners.
	Luster Enhancement				Avoid chemicals and ultrasonic cleaners.
Larimar	None				Avoid chemicals and ultrasonic cleaners.
Larimar	Impregnated	To increase durability & improve appearance	Occasionally	Good to Very Good	Avoid chemicals and ultrasonic cleaners.
Magnesite	None			Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
	Dyed	To provide color or uniformity of color or color durability		Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
	Impregnated	To provide color or uniformity of color or color durability		Very Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
	Dyed and Impregnated	To increase durability & improve appearance		Very Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Malachite	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Malachite	Impregnated with plastic or other hardened agents	To improve durability & appearance	Rarely	Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Marcasite	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Moldavite	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Moonstone - Blue, Grey, Orange, Rainbow, White	None				Normal. Click here for cleaning and care instructions.
Mother-of-pearl, White	None				Avoid chemicals & ultrasonic cleaners.
• Colors	None				Avoid chemicals & ultrasonic cleaners.
• Colors	Dyed	To stabilize color	Usually	Good	Avoid chemicals & ultrasonic cleaners.
Mother-of-pearl Doublet (an assembled product)	None	To improve durability or increase thickness	Always	Good	Avoid chemicals and ultrasonic cleaners.
Mother-of-pearl Doublet (an assembled product)	Dyed	To stabilize color	Usually	Good	Avoid chemicals and ultrasonic cleaners.
Mother-of-pearl Watch Dial (an assembled product)					Avoid heat, chemicals, ultrasonic cleaners & repolishing.
• White	None				Avoid heat, chemicals, ultrasonic cleaners & repolishing.
• Colors	None				Avoid heat, chemicals, ultrasonic cleaners & repolishing.
• Colors	Dyed	To alter color	Commonly	Good	Avoid heat, chemicals, ultrasonic cleaners & repolishing.
• Bright Fashion Colors	Coated with colored polymer	To improve durability	Commonly	Good	Avoid heat, chemicals, ultrasonic cleaners & repolishing.
Obsidian (All varieties)	None				Avoid heat, chemicals, ultrasonic cleaners & repolishing.
Onyx (also see agate) •Black •Blue •Green •Red	Dyed	To alter color	Usually	Excellent to Good	Normal. Certain stones may fade in heat or light.
Opal •Black •Semi-Black •White •Fire Opal •Fire Opal with Matrix	None				Avoid heat, chemicals, ultrasonic cleaners & repolishing
• Boulder	None				Avoid heat, chemicals, ultrasonic cleaners & repolishing
• Boulder	Impregnated with colorless plastic	To improve appearance	Occasionally	Fair	Avoid heat, chemicals, ultrasonic cleaners & repolishing
• Translucent Blue, Green, Pink	None				Avoid heat, chemicals, ultrasonic cleaners & repolishing
Opal Doublet (an assembled product)	None	To improve durability and/or color	Always	Good	Avoid heat, chemicals, ultrasonic cleaners & repolishing
Opal Triplet(an assembled product)	None	To improve durability and/or color	Always	Good	Avoid heat, chemicals, ultrasonic cleaners & repolishing
Pearl, Cultured, All	None				Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Bleached	To improve color & uniformity	Usually	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Dyed	To add or improve color	Sometimes	Very Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Irradiated	To add or improve color	Sometimes	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Chemical treatment	To add or improve color	Sometimes	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Polished	To improve surface appearance	Unknown	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Luster Enhancement	To improve OVERALL appearance	Sometimes	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
Pearl, Mabe (An asemlbed product with a cultured pearl cap)	Bleached	To improve color & uniformity	Frequently	Fair to Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Color Coated under the Cap	To add or improve color	Frequently	Fair to Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Dyed	To add or improve color	Frequently	Fair to Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Filled	To improve appearance & durability	Always	Fair to Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
Pearl, South Sea Cultured	None				Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Polished	To improve appearance	Unknown	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Heavily Polished	To improve appearance	Unknown	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
Pearl, Tahitian Cultured	None				Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Polished	To improve appearance	Unknown	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Heavily Polished	To improve appearance	Unknown	Excellent	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
Peridot	None				Avoid sudden temperature changes, harsh chemicals, and ultrasonic cleaners.
Phosphosiderite	None				Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Luster Enhancement	To improve appearance	Unknown	Very Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
	Impregnated	To improve appearance	Unknown	Very Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
Prehnite	None				Avoid heat, chemicals & ultrasonic cleaners
Prehnite	Luster Enhancement	To improve appearance	Unknown	Very Good	Avoid heat and chemicals, cosmetics, household cleaners & ultrasonic cleaners.
Quartz
• Black & Ginger	Irradiated	To alter color	Always	Excellent	Normal. Click here for cleaning and care instructions.
• Colorless	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Cat's Eye Quartz	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Cinnamon	Heated	To alter color	Usually	Excellent	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Cinnamon	Irradiated	To alter color	Usually	Excellent	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Coated - All Colors	Coated- Often called Diffusion Treated	To alter color	Often	Excellent	Normal. Click here for cleaning and care instructions.
•Green to yellow, Limon, Orange to brown	Heated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
•Green to yellow, Limon, Orange to brown	Irradiated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
• Hawk's Eye Blue	None				Normal. Click here for cleaning and care instructions.
• Lazulated	None				Normal. Click here for cleaning and care instructions.
• Mint	Heated	To alter color	Usually	Excellent	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Mint	Irradiated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
• Moss Green	Heated	To alter color	Usually	Excellent	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Moss Green	Irradiated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
• Pink, White (colorless AKA Rock Crystal Quartz)	None				Some material may fade with long exposure to sunlight.
• Pink with Opalescence	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
•Quench Crackled	Heated and Quenched	To introduce crackled structure	Always	Fair to Poor	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
•Quench Crackled	Dyed	To add or improve color	Often	Fair to Poor	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
• Rose	None				Normal. Click here for cleaning and care instructions.
•Rutilated	None				Normal. Click here for cleaning and care instructions.
•Rutilated	Luster Enhancement	To improve appearance	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
•Smoky	Heated	to create color	Commonly	Excellent	Some material may fade with long exposure to sunlight.
•Smoky	Irradiated	to create color	Commonly	Excellent	Normal. Click here for cleaning and care instructions.
•Smoky Citrene	None				Normal. Click here for cleaning and care instructions.
	Heated	to create color	Commonly	Excellent	Normal. Click here for cleaning and care instructions.
	Irradiated	to create color	Commonly	Excellent	Normal. Click here for cleaning and care instructions.
•Tiger's-Eye, Golden Brown	None				Normal. Click here for cleaning and care instructions.
•Tiger's-Eye, Golden Brown	Bleached	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
•Tiger's-Eye, Red	Heated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
	Dyed	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
	Bleached	To alter color	Usually	Excellent	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
•Tourmalinated	None				Normal. Click here for cleaning and care instructions.
•Tourmalinated	Luster Enhancement	To improve appearance	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
Quartzite	None				Normal. Click here for cleaning and care instructions.
	Dyed	To alter color	Commonly	Good	Normal. Click here for cleaning and care instructions.
	Dyed and Impregnated	To improve color and appearance	Often	Very Good	Normal. Click here for cleaning and care instructions.
	Impregnated with colorless plastic	To increase durability & improve appearance	Commonly	Good	Normal. Click here for cleaning and care instructions.
	Luster Enhancement	To improve appearance	Often	Very Good	Normal. Click here for cleaning and care instructions.
Rhodochrosite	None				Normal. Click here for cleaning and care instructions.
Rhodolite Garnet	None				Normal. Click here for cleaning and care instructions.
Rhodonite	None				Normal. Click here for cleaning and care instructions.
Rock (Quartzite, Feldspar and Quartzite, Other 'Rock" materials)	None				Normal. Click here for cleaning and care instructions.
	Dyed	To alter color	Commonly	Very Good	Normal. Click here for cleaning and care instructions.
	Dyed and Impregnated	To alter color	Often	Very Good	Normal. Click here for cleaning and care instructions.
	Impregnated	To increase durability & improve appearance	Commonly	Very Good	Normal. Click here for cleaning and care instructions.
	Luster Enhancement	To improve appearance	Often	Very Good	Normal. Click here for cleaning and care instructions.
Ruby	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
	Filling of surface cavities and fractures as a by-product of heating and visible under 10 X magnification.	No visible effect	Commonly	Good to Very Good	Normal. Click here for cleaning and care instructions.
	Latice Diffusion - See Red Sapphire	To alter color	Occasionally	Excellent	Normal. Click here for cleaning and care instructions.
Sapphire •Colorless	None				Normal. Click here for cleaning and care instructions.
Sapphire •Colorless	Heated				Normal. Click here for cleaning and care instructions.
•Red •Blue •Pink •Orange •Yellow •Other Fancy Colors	None				Normal. Click here for cleaning and care instructions.
	Heated	To produce or alter color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
	Filling of surface cavities and fractures as a by-product of heating and visible under 10 X magnification.	No visible effect	Commonly	Excellent	Normal. Click here for cleaning and care instructions.
	Lattice Diffusion	To alter color	Occasionally	Excellent	Normal. Click here for cleaning and care instructions.
Sard	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Occasionally	Excellent to Good	Normal. Click here for cleaning and care instructions.
	Dyed	To alter color	Occasionally	Excellent to Good	Normal. Click here for cleaning and care instructions.
Seraphinite	None				Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
	Dyed	To improve hardness & luster	Occasionally	Good	Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
	Luster Enhancement
Serpentine	None				Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
	Dyed	To alter color	Commonly	Fair to Good	Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
	Impregnated w/plastic	To improve hardness & luster	Occasionally	Very Good	Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
	Luster Enhancement	To improve appearance	Often	Very Good	Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
Shell - Abalone, Spiny Oyster or Other	None				Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
Shell - Abalone, Spiny Oyster or Other	Dyed	To create color	Commonly	Good	Avoid sudden temperature changes, chemicals and ultrasonic cleaners.
Sodalite	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Sodalite	Dyed	To affect color	Rarely	Fair	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Spinel	None				Normal. Click here for cleaning and care instructions.
Spinel	Heated	To change color	Occasionally	Excellent	Normal. Click here for cleaning and care instructions.
Sugilite	None				Normal. Click here for cleaning and care instructions.
Sugilite	Luster Enhancement	To improve appearance	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
Tanzanite (Zoisite)	Heated	To produce the violet-blue color for which the stone is known	Usually	Excellent	Normal. Click here for cleaning and care instructions.
Topaz, Blue	Heated	To produce the blue color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
Topaz, Blue	Irradiated	To produce the blue color	Usually	Excellent	Normal. Click here for cleaning and care instructions.
• Green to Blue	Coated, Often referred to a Diffusion Treated	To alter color	Often	Excellent	Normal. Click here for cleaning and care instructions.
• Yellow/Orange, Pink/Red	Heated	To intensify color	Occasionally	Variable	Normal. Click here for cleaning and care instructions.
• Yellow/Orange, Pink/Red	Coated	To alter color	Often	Excellent	Normal. Click here for cleaning and care instructions.
• White (colorless)	None				Normal. Click here for cleaning and care instructions.
• White (colorless)	Heated	To alter color	Occasionally	Very Good	Normal. Click here for cleaning and care instructions.
Tourmaline					Normal. Click here for cleaning and care instructions.
•Green •Yellow/Orange •Pink •Green/Blue (Teal) •Indicolite (deep vivid Green-blue) •Cat's-Eye	None				Normal. Click here for cleaning and care instructions.
	Heated	To alter color	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
	Irradiated	To alter color	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
	Luster Enhancement	To improve Appearance	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
• Rubellite (deep, vivid purple-red)	None				Normal. Click here for cleaning and care instructions.
	Heated	To improve color	Commonly	Good	Normal. Click here for cleaning and care instructions.
	Irradiated	To improve color	Commonly	Good	Normal. Click here for cleaning and care instructions.
	Oiling (QVC knowingly accepts only colorless oil for rubellite.)	To improve apparent clarity	Unknown	Good to Fair	Avoid steaming, chemicals and ultrasonic cleaners
	Luster Enhancement	To improve appearance	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
• Beads and Cabochons	Luster Enhancement	To improve appearance	Unknown	Very Good	Normal. Click here for cleaning and care instructions.
Turquoise	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
	Impregnated with colorless resin or plastic	To improve color & durability	Commonly	Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
	Proprietary Zachery Method	To improve color & durability	Commonly	Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
	Luster Enhancement	To improve color & durability	Commonly	Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Turquoise - Composite	Dyed and impregnated with resin	The composite material is a manufactured product consists primarily of turquoise and resin. Artificial veining	Always	Fair	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Unakite	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Varisite	None				Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Impregnated w/colorless plastic	To improve durability for shaping and polishing	Commonly	Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
	Luster Enhancement	To improve appearance	Unknown	Very Good	Avoid heat, temperature changes, steaming, chemicals, abrasives, ultrasonic cleaners & repolishing.
Zircon - all colors	None				Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
Zircon - all colors	Heated	To alter color	Commonly	Very Good	Avoid heat, temperature changes, steaming, chemicals, ultrasonic cleaners & repolishing.
This chart reflects only those treatments that QVC knowingly accepts.

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