Many gemstones are treated to enhance their beauty, and some require special care to ensure they maintain their look for years to come.
Gemstones |
Enhancement & Care |
| Abalone |
Not enhanced. Avoid chemicals, heat, and ultrasonics. |
| Agate (Chalcedony) |
Commonly dyed and/or heat treated. Avoid chemicals, heat and strong light. |
| Alexandrite (Chrysoberyl) |
Not known to be enhanced. |
| Almandite (Garnet) |
Not known to be enhanced. Avoid sudden temperature changes. |
| Amazonite |
Occasionally impregnated with colorless wax, paraffin. Avoid chemicals, heat, and ultrasonics. |
| Amber |
Occasionally heat treated and/or rarely dyed. Avoid chemicals, heat and ultrasonics. |
| Amethyst (Quartz) |
Occasionally heat treated. |
| Ametrine |
Not enhanced. |
| Andalusite |
Not enhanced. |
| Andesine |
Various treatments. Avoid chemicals, heat, strong light, and ultrasonics. |
| Andradite Grossular (Garnet) |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Apatite |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Aquamarine |
Usually heat treated. |
| Aragonite |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Australian Opal |
Rarely impregnated with colorless wax/oil/resins. Avoid chemicals, heat and ultrasonics. |
| Aventurine |
Not known to be enhanced. |
| Azurite |
Occasionally coated and/or impregnated with colorless wax. Avoid chemicals, heat and ultrasonics. |
| Benitoite |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Beryl-Blue |
Always irradiated. Avoid heat and strong light. |
| Beryl-Pink |
Commonly heat treated. |
| Beryl-Red |
Not enhanced. |
| Beryl-Yellow |
Usually irradiated. Avoid heat and strong light. |
| Beryl-Yellow/Green |
Not enhanced. |
| Bi-Color Quartz |
Not known to be enhanced. |
| Bi-Color Tourmaline |
Usually heat treated. |
| Black Diamond |
Occasionally heat treated and/or irradiated. Avoid chemicals. |
| Black Onyx |
Always dyed. Avoid chemicals, heat, and strong light. |
| Black Spinel |
Not Enhanced. |
| Black Star Diopside |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Black Star Sapphire |
Usually heat treated and/or occasionally dyed. Avoid chemicals, heat and ultrasonics. |
| Bloodstone (Chalcedony) |
Not enhanced. |
| Blue Agate |
Commonly dyed and/or heat treated. Avoid chemicals. |
| Blue Gold Stone |
Usually enhanced with various coatings. Avoid chemicals, heat and ultrasonics. |
| Blue Lace Agate |
Not enhanced. |
| Blue Sapphire |
Usually heat treated. |
| Blue Spinel |
Not enhanced. |
| Blue Star Sapphire |
Usually heat treated. |
| Blue Tiger Eye |
Occasionally bleached and/or dyed and/or heat treated. Avoid chemicals. |
| Blue Topaz |
Usually heat treated and/or irradiated. |
| Blue Zircon |
Occasionally heat treated. Avoid chemicals. |
| Botswana Agate |
Commonly dyed and/or heat treated. Avoid chemicals. |
| Boulder Opal |
Occasinally infused with unhardened colorless substance. Avoid chemicals, heat and ultrasonics. |
| Brown Gold Stone |
Usually enhanced with various coatings. Avoid chemicals, heat and ultrasonics. |
| Carnelian (Chalcedony) |
Usually heat treated. Avoid chemicals, heat, and strong light. |
| Cat's Eye |
Occasionally irradiated. Avoid chemicals, heat and ultrasonics. |
| Chalcedony-Agate |
Commonly dyed and/or heat treated. Avoid chemicals, heat, and strong light. |
| Chalcedony-Black Onyx |
Always dyed. Avoid chemicals, heat, and strong light. |
| Chalcedony-Blue |
Commonly dyed. Avoid chemicals, heat, and strong light. |
| Chalcedony-Carnelian |
Usually heat treated. Avoid chemicals, heat, and strong light. |
| Chalcedony-Green |
Usually dyed. Avoid chemicals, heat, and strong light. |
| Chalcedony-Jasper |
Occasionally dyed. Avoid chemicals, heat, and strong light. |
| Chalcedony-Orange |
Commonly dyed. Avoid chemicals, heat, and strong light. |
| Chameleon diamand |
Occasionally heat treated and/or irradiated. Avoid chemicals and heat. |
| Champagne Citrine |
Usually heat treated. Avoid heat. |
| Champagne Diamond |
Occasionally heat treated and/or irradiated. Avoid chemicals and heat. |
| Charoite |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Chrome Diopside |
Not enhanced. Avoid sudden temperature changes and chemicals. |
| Chrome Tourmaline |
Not enhanced. Avoid heat and ultrasonics. |
| Chrysoberyl |
Not enhanced. |
| Chrysocolla |
Not enhanced. Avoid ultrasonics. |
| Chrysoprase |
Not enhanced. Avoid strong light. |
| Citrine |
Usually heat treated. Avoid heat. |
| Color Change Garnet |
Not enhanced. Avoid chemicals and heat. |
| Color Change Sapphire |
Usually heat treated. |
| Coral |
Usually dyed and/or bleached to improve color. Avoid chemicals, heat and ultrasonics. |
| Cultured Pearl |
Usually bleached and/or occasionally dyed. Avoid chemicals, cosmetics, and ultrasonics. |
| Demantoid Garnet |
Not enhanced. Avoid sudden temperature changes. |
| Diamond-Colored |
Occasionally heat treated and/or irradiated. Avoid chemicals, heat and ultrasonics. |
| Diamond-Colorless |
Occasionally heat treated and/or irradiated. Avoid chemicals, heat and ultrasonics. |
| Diopside |
Not known to be enhanced. |
| Drusy |
Commonly dyed or treated. Avoid chemicals. |
| Emerald |
Usually treated with colorless oil, wax, or natural. Avoid chemicals, heat and ultrasonics. |
| Fire Agate |
Not enhanced. |
| Fluorite |
Commonly heat treated and/or rarely irradiated. Avoid chemicals, heat and ultrasonics. |
| Freshwater Pearl |
Occasionally bleached and/or dyed. Avoid chemicals, heat and ultrasonics. |
| Garnet |
Not known to be enhanced. Avoid sudden temperature changes. |
| Garnet-Almandite |
Not enhanced. Avoid sudden temperature changes. |
| Garnet-Demantoid |
Not enhanced. Avoid sudden temperature changes. |
| Garnet-Grossularite |
Not enhanced. Avoid sudden temperature changes. |
| Garnet-Pyrope |
Not enhanced. Avoid sudden temperature changes. |
| Garnet-Rhodolite |
Not enhanced. Avoid sudden temperature changes. |
| Garnet-Spessartite |
Not enhanced. Avoid sudden temperature changes. |
| Garnet-Tsavorite |
Not enhanced. Avoid sudden temperature changes. |
| Goldstone |
Usually enhanced with various coatings. Avoid chemicals, heat and ultrasonics. |
| Grape Garnet |
Not enhanced. Avoid chemicals and heat. |
| Green Agate |
Commonly dyed and/or heat treated. Avoid chemicals. |
| Green Bloodstone |
Commonly dyed. Avoid chemicals, heat and ultrasonics. |
| Green Quartz |
Usually heat treated. Avoid chemicals, heat and ultrasonics. |
| Green Sapphire |
Usually heat treated. |
| Green Tourmaline |
Commonly heat treated. Avoid chemicals, heat and ultrasonics. |
| Grey Agate |
Commonly dyed and/or heat treated. Avoid chemicals. |
| Grossular Garnet |
Not known to be enhanced. Avoid sudden temperature changes. |
| Hematite |
Not enhanced. Avoid chemicals and heat. |
| Hemimorphite |
Not enhanced. |
| Hessonite (Grossular Garnet) |
Not enhanced. Avoid chemicals and heat. |
| Howlite |
Occasionally dyed. Avoid chemicals, heat and ultrasonics. |
| Imperial Jade |
Commonly dyed and/or heat treated. Avoid chemicals and heat. |
| Imperial Topaz |
Commonly heat treated and/or irradiated. Avoid chemicals and heat. |
| Indicloite (Tourmaline) |
Commonly heat treated. Avoid chemicals, heat and ultrasonics. |
| Iolite |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Jade (Green, White, and Purple) |
Commonly bleached and/or dyed. Avoid chemicals, strong light, and ultrasonics. |
| Jasper |
Occasionally dyed. Avoid chemicals, heat, and strong light. |
| Kunzite |
Commonly heat treated and/or irradiated. Avoid strong light and ultrasonics. |
| Labradorite |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Lapis LazuliI |
Commonly dyed or impregnated with colorless wax/oil. Avoid chemicals and ultrasonics. |
| Leopard Skin Jasper |
Not enhanced. |
| Lilas Quartz |
Occasionally heat treated. Avoid chemicals and heat |
| London Blue Topaz |
Usually heat treated and/or irradiated. |
| Mabe Pearl |
Commonly bleached and/or dyed. Avoid chemicals, heat and ultrasonics. |
| Madeira Citrine |
Not known to be enhanced. Avoid heat. |
| Malachite |
Occasionally coated with colorless wax. Avoid chemicals, heat and ultrasonics. |
| Malaya Garnet |
Not enhanced. Avoid heat. |
| Mandarin Garnet |
Not enhanced. Avoid heat. |
| Marcasite |
Not enhanced. Avoid chemicals and heat. |
| Mawsitsit |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Mexican Black Opal |
Rarely impregnated with oil/wax and resins. Avoid chemicals, heat and ultrasonics. |
| Mexican Cherry Opal |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Mexican Fire Opal |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Mocha Zircon |
Occasionally heat treated. Avoid chemicals. |
| Moldavite (Tektite) |
Not enhanced. Avoid chemicals and heat. |
| Moonstone |
Not enhanced. |
| Morganite (Beryl) |
Commonly heat treated. |
| Moss Agate |
Occasionally dyed and/or heat treated. Avoid chemicals. |
| Mother of Pearl |
Commonly dyed. Avoid chemicals, heat and ultrasonics. |
| Mozambique Garnet |
Not enhanced. |
| Mystic Topaz |
Always enhanced with various coatings. Avoid chemicals, heat and ultrasonics. |
| New Jade |
Commonly dyed. Avoid chemicals, heat and ultrasonics. |
| Obsidian |
Not enhanced. Avoid chemicals and heat. |
| Onyx (Chalcedony) |
Black and colored onyx is always dyed. Avoid chemicals. |
| Opal |
Rarely impregnated with colorless wax/oil/resins. Avoid chemicals, heat and ultrasonics. |
| Opal Doublet |
Rarely impregnated with colorless wax/oil/resins. Avoid chemicals, heat and ultrasonics. |
| Opal Triplet |
Covered with colorless quartz. Avoid chemicals, heat and ultrasonics. |
| Orange Chalcedony |
Not known to be enhanced. |
| Orange Sapphire |
Usually heat treated. |
| Ouro Verde |
Always irradiated. |
| Padparadscha (Sapphire) |
Usually heat treated. |
| Paraiba Tourmaline |
Commonly heat treated. Avoid chemicals, heat and ultrasonics. |
| Pearl |
Commonly bleached and/or rarely dyed. Avoid chemicals, cosmetics, and ultrasonics. |
| Peridot |
Rarely treated with colorless oil/wax or natural. Avoid sudden temperature changes, chemicals, and ultrasonics. |
| Peruvian Blue Opal |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Pink Sapphire |
Usually heat treated. |
| Pink Tourmaline |
Occasionally heat treated. Avoid chemicals, heat and ultrasonics. |
| Precious Topaz |
Occasionally heat treated and/or irradiated. Avoid chemicals, heat and ultrasonics. |
| Purple Jade |
Commonly treated wtih a two-step bleaching and polish. Avoid ultrasonics. |
| Purple Sapphire |
Usually heat treated. |
| Pyrite |
Not enhanced. Avoid chemicals and heat. |
| Pyrope Garnet |
Not enhanced. Avoid sudden temperature changes. |
| Quartz |
Occasionally dyed and/or heat treated and/or irradiated. Avoid chemicals. |
| Red Agate |
Commonly dyed and/or heat treated. Avoid chemicals. |
| Red Labradorite |
Various treatments. Avoid chemicals, heat, strong light, and ultrasonics. |
| Red Spinel |
Not known to be enhanced. |
| Rhodochrosite |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Rhodolite Garnet |
Not enhanced. Avoid sudden temperature changes. |
| Rose De France |
Occasionally heat treated. Avoid chemicals, heat and ultrasonics. |
| Rose Quartz |
Not enhanced. Avoid chemicals. |
| Rubellite (Tourmaline) |
Occasionally heat treated. Avoid chemicals, heat and ultrasonics. |
| Ruby |
Usually heat treated. Avoid chemicals. |
| Rutilated Quartz |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Sapphire (Corundum) |
Usually heat treated. |
| Serpentine |
Commonly dyed and/or impregnated with colorless wax. Avoid ultrasonics. |
| Sky Blue Topaz |
Usually heat treated and/or usually irradiated. Avoid heat and strong light. |
| Smoky Quartz |
Always irradiation of colorless quartz. |
| Snake Skin Jasper |
Not enhanced. |
| Snowflake Obsidian |
Not enhanced. Avoid chemicals and heat. |
| Sodalite |
Rarely dyed. Avoid chemicals and heat. |
South Sea Pearl |
Occasionally bleached and/or dyed. Avoid chemicals, heat and ultrasonics. |
| Spessartite Garnet |
Not enhanced. Avoid sudden temperature changes. |
| Sphene |
Not known to be enhanced. Avoid chemicals, heat and ultrasonics. |
| Spinel |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Star Ruby |
Not known to be enhanced. |
| Sugilate |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Sunstone |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Swiss Blue Topaz |
Usually heat treated and/or usually irradiated. Avoid chemicals, heat and ultrasonics. |
| Tahitian Pearl |
Occasionally bleached and/or dyed. Avoid chemicals, heat and ultrasonics. |
| Tanzanite |
Usually heat treated. Avoid sudden temperature changes and ultrasonics. |
| Tashmarine |
Not known to be enhanced. |
| Teal Diamond |
Occasionally heat treated and/or irradiated. Avoid heat, and ultrasonics. |
| Tiger's Eye |
Occasionally bleached and/or dyed and/or heat treated. Avoid heat and strong light. |
| Topaz-Blue |
Usually heat treated and irradiated. Avoid chemicals, heat and ultrasonics. |
| Topaz-Brown |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Topaz-Green |
Usually irradiated. Avoid chemicals, heat and ultrasonics. |
| Topaz-Pink |
Usually heat treated. Avoid chemicals, heat and ultrasonics. |
| Topaz-Yellow/Orange |
Occasionally irradiated. Avoid chemicals, heat and ultrasonics. |
| Tourmaline-Chrome |
Not enhanced. Avoid heat and ultrasonics. |
| Tourmaline-Green/Blue |
Commonly heat treated and/or irradiated. Avoid chemicals, heat, strong light, ultrasonics. |
| Tourmaline-Pink/Red/Purple |
Commonly heat treated and/or irradiated. Avoid, chemicals, heat, strong light, and ultrasonics. |
| Tourmaline-Yellow/Orange |
Rarely heat treated and/or irradiated. Avoid chemicals, heat, strong light, and ultrasonics. |
| Tsavorite Garnet |
Not enhanced. Avoid sudden temperature changes. |
| Turquoise |
Commonly impregnated wtih plastic, colorless oil. Avoid chemicals, heat and ultrasonics. |
| Umbalite Garnet |
Not enhanced. Avoid sudden temperature changes. |
| Unakite |
Not enhanced. Avoid chemicals. |
| Violet Quartz |
Occasionally heat treated. Avoid chemicals, heat and ultrasonics. |
| Violet Sapphire |
Usually heat treatead. |
| Water Sapphire (Iolite) |
Not enhanced. Avoid chemicals, heat and ultrasonics. |
| Watermelon Tourmaline |
Occasionally heat treated. Avoid chemicals, heat and ultrasonics. |
| White Quartz |
Occasionally dyed and/or heat treated and/or irradiated. Avoid chemicals. |
| White Sapphire |
Usually heat treated. |
| Yellow Agate |
Commonly dyed and/or heat treated. Avoid chemicals. |
| Yellow Onyx |
Commonly dyed and/or heat treated. Avoid chemicals. |
| Yellow Sapphire |
Usually heat treated and/or occasionally irradiated. |
| Zircon |
Occasionally heat treated. Avoid chemicals. |
EVINE Live vendor guidelines require vendors to fully understand and comply with all applicable United States laws and regulations concerning the sale of all products, including gemstones.
In addition, all merchandise must contain Country of Origin information, as mandated by United States Customs Service and Federal Trade Commission. All printed material must be legible and in English. Abbreviations for countries names are not permitted unless specifically authorized by the Commissioner of Customs.
