| Amber |
All colors |
Heated to improve color and clarity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes, abrasives and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Andalusite |
|
None |
Basic jewelry care |
|
| Apatite |
|
None |
Do not use ultrasonic cleaning. Avoid sudden temperature changes, abrasives and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Azurite |
|
Coated with colorless substances to improve surface uniformity and durability. |
Do not use ultrasonic cleaning. Avoid contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Beryl |
Golden, Yellow |
Irradiated to improve color. |
Basic jewelry care |
| |
Aquamarine |
Heated to improve color and clarity. |
Basic jewelry care |
| |
Emerald, Green |
Infused with colorless substances to improve clarity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
| |
Morganite |
Heated and/or irradiated to enhance color. |
Basic jewelry care |
|
| Calcite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Chalcedony |
Bloodstone, Chrysocolla, Chrysoprase, Jasper, Sardonyx, White |
None |
Basic jewelry care |
| |
Black, Blue and Green Onyx |
Dyed |
Basic jewelry care |
| |
Agate, Carnelian |
Heated to improve color. |
Basic jewelry care |
| |
Blue |
None |
Avoid direct light |
| |
Blue, Blue Lace Agate |
None |
Avoid direct light |
|
| Charoite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
|
| Chrysoberyl |
Alexandrite, Brown, Cat's Eye, Cat's Eye Alexandrite, Green, Yellow |
None |
Basic jewelry care |
|
| Corundum |
Yellow Sapphire |
Heated and/or diffused to improve color and clarity. Infused with colorless substances to improve color and clarity.. |
Basic jewelry care |
| |
Blue, Color Change, Colorless, Green, Orange, Padparadscha, Pink, Purple, Star, Ruby, and Ruby Star |
Heated to improve color and clarity. Infused with colorless substances to improve color and clarity. |
Basic jewelry care |
|
| Diamond |
|
None |
Basic jewelry care |
|
| Dolomite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Enstatite |
Bronzite |
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Epidote |
|
None |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Feldspar |
Labradorite, Labradorite (Rainbow Moonstone), Orthoclase (Moonstone), Spectrolite, Sunstone |
None |
Do not use ultrasonic cleaning. Avoid sudden temperature changes |
| |
Amazonite |
Coated with colorless substances to improve surface uniformity. |
and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Fluorite |
|
Heated to improve color. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Garnet |
Almandite, Color Change, Grossular Garnet, Hessonite, Malaya Garnet, Pyrope, Rhodolite, Spessartite, Tsavorite |
None |
Avoid sudden temperature changes. |
| |
Demantoid |
Heated to improve color |
Basic jewelry care |
|
| Granite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
|
| Hematite |
|
None |
Basic jewelry care |
|
| Iolite |
|
None |
Do not use ultrasonic cleaning. |
|
| Jade |
Black, Green and Lavender Jadeite, Black and Green Nephrite |
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
|
| Kyanite |
Blue |
None |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Lapis Lazuli |
|
Coated with colorless substances to improve surface uniformity and durability. |
Do not use ultrasonic cleaning. Avoid contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Lava Rock |
|
None |
Do not use ultrasonic cleaning. |
|
| Malachite |
|
Coated with colorless substances to improve surface uniformity and durability. |
Do not use ultrasonic cleaning. Avoid contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Natural Glass |
Lybian Desert Glass, Moldavite, Obsidian |
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Nuumite |
|
Coated with colorless substances to improve uniformity. |
Do not use ultrasonic cleaning. |
|
| Opal |
Black, Blue, Boulder, Cachalong, Chrysopal, Crystal, Fire, Opalite, Pink, Prase, White, Yellow |
Coated with colorless substances to improve surface uniformity and durability. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Pearl, cultured |
Saltwater: Akoya, Mabe (Assembled) |
Bleached and dyed to improve uniformity of color. |
For cultured and natural pearls: Have strands cleaned and re-strung annually if worn regularly. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. Do not use ultrasonic cleaning. |
| |
Keshi, South Sea Golden, South Sea White, Tahitian |
Bleached and dyed to improve uniformity of color. Polished to improve finish. Coated to protect the natural organic material. |
| |
Freshwater |
Bleached and dyed to improve uniformity of color. |
|
| Pearl, natural |
Freshwater, Saltwater |
Bleached and dyed to improve uniformity of color. |
|
| Calcareous Concretions |
Conch, Melo Melo |
Polished to improve finish. |
Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. Avoid over exposure to bright light. Do not use ultrasonic cleaning. |
|
| Peridot |
|
None |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Prehnite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Pyrite |
|
None |
Basic jewelry care |
|
| Pyrite in slate |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
|
| Quartz |
Amethyst and Citrine, Rock Crystal |
Heated to enhance color. |
Basic jewelry care |
| |
Green, Smokey, Yellow Citrine |
Heated and/or irradiated to enhance color. |
Basic jewelry care |
| |
Aventurine, Dumortierite, Pietersite, Quartzite, Rose, Rutilated, Tourmalinated, Tiger’s Eye, Tiger’s Iron, Hawk’s Eye |
Coated with colorless substances to improve surface uniformity. |
Basic jewelry care |
|
| Rhodochrosite |
|
Coated with colorless substances. |
Do not use ultrasonic cleaning. |
|
| Rhodonite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
|
| Ryolite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
|
| Serpentine |
Bowenite, Chita |
Coated with colorless substances to improve surface uniformity and durability. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Shell |
Mother-of-pearl, Helmet Shell |
Dyed and/or coated with colorless substances to improve surface uniformity |
Basic jewelry care. Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Sodalite |
|
Coated with colorless substances to improve surface uniformity and durability. |
Do not use ultrasonic cleaning. Avoid contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Sphalerite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Spinel |
All colors |
Heated to improve color |
Basic jewelry care |
| |
Black Spinel |
None |
Basic jewelry care |
|
| Spodumene |
Kunzite |
Heated and/or irradiated to enhance color. |
Do not use ultrasonic cleaning. Avoid direct sunlight. |
| |
Hiddenite |
Heated and/or irradiated to enhance color. |
Do not use ultrasonic cleaning. |
|
| Sugilite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid contact with household chemicals. |
|
| Topaz |
Orange, Pink, Yellow, Blue, Reddish Orange |
Heated and/or irradiated to enhance color. |
Basic jewelry care |
|
| Tourmaline |
Chrome |
None |
For all varieties of tourmaline: Do not use ultrasonic cleaning. Avoid sudden temperature changes. |
| |
Blue, Green, Orange, Cuprian Elbaite, Yellow |
Heated to enhance color and clarity. |
|
| |
Parti-colored, Pink, Purple, Rubellite, Watermelon |
Irradiated to improve color. |
|
|
| Turquoise |
|
Stabilized to improve durability. Coated with colorless substances to improve surface uniformity and durability. |
Do not use ultrasonic cleaning. Avoid contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Unakite |
|
Coated with colorless substances to improve surface uniformity. |
Basic jewelry care |
|
| Variscite |
|
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. Avoid contact with cosmetics, hairspray, perfume or household chemicals. |
|
| Zircon |
All colors |
Heated to enhance color. |
Do not use ultrasonic cleaning. |
|
| Zoisite |
Tanzanite |
Heated to enhance color. |
Do not use ultrasonic cleaning. Avoid sudden temperature changes. |
| |
Ruby in Zoisite |
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
| |
Thulite |
Coated with colorless substances to improve surface uniformity. |
Do not use ultrasonic cleaning. |
|