Amber: Heated to improve color and clarity. Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hair spray, perfume, or household chemicals.

Andalusite: Basic jewelry care.

Apatite: None Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume, or household chemicals.

Azurite: Coated with colorless substances to improve surface uniformity and durability. Do not use ultrasonic cleaning. Avoid contact to cosmetics, hairspray, perfume or household chemicals.

Beryl Golden: Yellow Irradiated to improve color. Basic jewelry care Aquamarine, Morganite 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 to cosmetics, hairspray, perfume or household chemicals.

Calcite: Coated with colorless substances to improve surface uniformity. Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume or household chemicals.

Chalcedony Bloodstone, Blue, Chrysocolla, Chrysoprase, Jasper, Sardonyx: Basic jewelry care.

White,Black, Blue and Green Onyx: Dyed Basic jewelry care.

Agate, Carnelian: Heated to improve color. Basic jewelry care.

Charoite: Coated with colorless substances to improve surface uniformity. Do not use ultrasonic cleaning.

Chrysoberyl Alexandrite, Brown, Cat's Eye, Cat's Eye Alexandrite: Basic jewelry care.

Corundum Ruby, Star Ruby Blue: Basic jewelry care

Padparadscha, Pink, Purple, Star and Yellow Sapphire: Basic jewelry care Heated to improve color and clarity. Infused with colorless substances to improve color and clarity. Heated and/or diffused to improve color and clarity. Basic jewelry care

Diamond: Basic jewelry care.

Dolomite: Coated with colorless substances to improve surface uniformity. Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to 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 to cosmetics, hairspray, perfume or household chemicals.

Epidote: Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume or household chemicals.

Feldspar Labradorite, Moonstone, Spectrolite, Sunstone: Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume or household chemicals.

Amazonite: Coated with colorless substances to improve surface uniformity.

Fluorite: Heated to improve color. Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume or household chemicals.

Garnet Almandite, Demantoid, Grossular Garnet, Hessonite, Malaya Garnet, Pyrope, Rhodolite, Spessartite (Mandarin), Tsavorite: Avoid sudden temperature changes.

Granite: Coated with colorless substances to improve surface uniformity. Do not use ultrasonic cleaning.

Hematite: Basic jewelry care.

Iolite: 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: Do not use ultrasonic cleaning. Avoid sudden temperature changes and contact to 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 to cosmetics, hairspray, perfume, or household chemicals.

Lava Rock: Do not use ultrasonic cleaning.

Malachite: Coated with colorless substances to improve surface uniformity and durability. Don't use ultrasonic cleaning. Avoid contact to cosmetics, hairspray, perfume, or household chemicals.

Natural Glass, Nodavite, Obsidian: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume, or household chemicals.

Nuumite: Coated with colorless substances to improve uniformity. Don't use ultrasonic cleaning.

Opal Black, Blue, Boulder, Cachalong, Chrysopal, Crystal, Fire, Opalite, Pink, Prase: Coated with colorless substances to improve surface uniformity and durability. Don't use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume, or household chemicals.

Pearl, cultured Saltwater: Akoya, Mabe (Assembled) 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.

Cultured and natural pearls: Have strands cleaned and re-strung annually if worn regularly. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume or household chemicals. Don't use ultrasonic cleaning.

Freshwater pearls: Bleached and dyed to improve uniformity of color.

Peridot: Basic jewelry care.

Prehnite: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume, or household chemicals.

Pyrite: Basic jewelry care.

Pyrite in slate: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning.

Quartz Aventurine, Dumortierite, Pietersite, Quartzite, Rock Crystal, Rose, Rutilated, Tiger’s Eye, Tiger Iron, Tourmalinated: Basic jewelry care

Amethyst, Citrine, Praseolite, Smokey: Heated to enhance color. Basic jewelry care.

Rhodochrosite: Coated with colorless substances to improve surface uniformity. Basic jewelry care.

Rhodonite: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning.

Ryolite: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning.

Serpentine Bowenite, Chita: Coated with colorless substances to improve surface uniformity and durability. Don't use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume, or household chemicals.

Shell Mother-of-pearl: Dyed. Don't use ultrasonic cleaning. Avoid sudden temperature changes and contact to cosmetics, hairspray, perfume or household chemicals.

Sodalite: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning. Avoid contact to cosmetics, hairspray,and, perfume or household chemicals.

Sphalerite: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning. Avoid sudden temperature changes and contact with cosmetics, hairspray,and, perfume or household chemicals.

Spinel : Basic jewelry care.

Spodumene Kunzite: Heated and/or irradiated to enhance color. Don't use ultrasonic cleaning. Avoid direct sunlight.

Topaz Imperial, Orange, Pink, Yellow: Heated and/or irradiated to enhance color. Basic jewelry care.

Tourmaline Chrome: None For all varieties of tourmaline: Don't use ultrasonic cleaning. Avoid sudden temperature changes. Blue, Green, Indicolite, Paraiba: Heated to enhance color and clarity. Parti-colored, Pink, Purple, Rubellite, Watermelon Irradiated to improve color.

Turquoise: Coated with colorless substances to improve surface uniformity and durability. Don't use ultrasonic cleaning. Avoid contact to cosmetics, hairspray, perfume, or household chemicals.

Variscite: Coated with colorless substances to improve surface uniformity. Don't use ultrasonic cleaning. Avoid contact to cosmetics, hairspray, perfume, or household chemicals.

Zircon: Heated to enhance color. Don't use ultrasonic cleaning.