Gemstone Information and Care. Information * Loose gemstones * Jewelry Links Gemstone information Find  the lore and facts about the gem of your dreams. Genuine Gemstones. Alexandrite Amethyst Aquamarine Bloodstone Cameo Carnelian Chalcedony Chrysoprase Citrine Coral, Pink Diamond Emerald Fire Opal Garnet, Mozambique Garnet, Rhodolite Garnet, Tsavorite Iolite Jade Lapis Moonstone Onyx, Black Genuine Gemstones. Opal Pearl Peridot Ruby Sapphire, Blue Sapphire, Pink Sapphire, White Sapphire, Yellow Star sapphire Smoky Quartz Tanzanite Tigers Eye Topaz, London Blue Topaz, Precious Topaz, Sky Blue Topaz, Swiss Blue Topaz, White Tourmaline, Green Tourmaline, Pink Turquoise Zircon, Blue Chatham® Lab Created Gemstones. Alexandrite Emerald Padparadscha Ruby Sapphire, Blue Charles & Colvard® Created Jewels. Moissanite Gemstone and Jewelry Info. General         About Gold         Birthstone chart         Faceted cut examples         About calibrated gems         Stone color chart     Gemstone Grades/treatments.         AGTA Guidelines         Gemstone Grade chart     Gem mm to carat conversions.         Pearls required for stringing         Marquise cut carat chart         Emerald cut carat chart         Oval cut carat chart         Pear cut carat chart         Round cut carat chart     Diamond Information.         Four's C's of Diamond's         Diamond carat conversions

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