Bicolor Gemstones Explained: Watermelon Tourmaline, Ametrine, Bi-Color Sapphire, Bi-Color Topaz, Bi-Color Fluorite, Zoned Quartz and Rare Two-Color Gems
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Gemstones by Luster Explained: Vitreous, Silky, Resinous, Metallic, Pearly and Greasy Luster Guide
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Gemstone Type Families Explained: Corundum, Beryl, Quartz, Garnet, Feldspar, Spinel, Zircon, Tourmaline, Topaz, Apatite, Sapphire Group and Chalcedony Family
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Gemstones by Optical Effect Explained: Opalescence, Chatoyancy, Asterism, Adularescence, Aventurescence, Labradorescence and More
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Gemstone Mining Countries Map Explained: Which Countries Are Famous for Diamond, Sapphire, Ruby, Emerald, Opal, Tanzanite, Jade, Ammolite and More
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Gemstone Origins by Country: Which Gems Sri Lanka, Myanmar, Madagascar, Thailand, Colombia, Zambia and More Are Famous For
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Gemstone Inclusions as Art: Rutile, Silk, Needles, Fingerprints, Gardens, Moss Patterns, Veils, Phantoms and More Explained
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Moonstone Sheen Colors Explained: Blue Moonstone, Rainbow Moonstone, Peach Moonstone, Green Moonstone, Black Moonstone and Rare Optical Effects
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Rainbow Gemstones Explained: Black Opal, Labradorescence, Alexandrite, Tourmaline, Bismuth Crystal, Fluorite and More
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Types of Opals Explained: Black Opal, Crystal Opal, Boulder Opal, Fire Opal, White Opal, Ethiopian Opal and More
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Colors of Pearls: Complete Guide to Natural Pearl Colors, Overtones, Types, Value and Rarity
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Gemstone Origins Guide: Where Gemstones Come From and How Origin Affects Value, Rarity, Color, and Price
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Gemstone Cuts Explained: Round Brilliant, Oval, Cushion, Pear, Emerald Cut, Marquise, Heart, Trillion, Radiant, Asscher, Princess, and Baguette
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25 Red Gemstones Explained: Ruby, Garnet, Red Spinel, Red Tourmaline, Padparadscha Sapphire and Other Natural Red Stones
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25 Blue Gemstones Explained: Blue Sapphire, Blue Spinel, Blue Topaz, Lapis Lazuli, Aquamarine, Tanzanite, Turquoise, Larimar and Rare Blue Collector Stones
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20 Types of Labradorite: Blue, Green, Golden, Rainbow, Spectrolite, Cat’s Eye and Rare Labradorite Colors Explained
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Black Gemstones and Gems: Complete Guide to Black Diamonds, Black Sapphire, Onyx, Obsidian, Black Pearl and More
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Top 10 Gems Older Than Dinosaurs: Ancient Diamond, Zircon, Ruby, Sapphire, Emerald, Garnet, Spinel, Jadeite, Peridot, and Moonstone Explained
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10 Gemstones Found Only Once: Painite, Kyawthuite, Taaffeite, Musgravite, Grandidierite, Jeremejevite, Red Beryl, Benitoite, Serendibite, and Fingerite Explained
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10 Gems From Space and Meteor Impact: Moldavite, Libyan Desert Glass, Darwin Glass, Australite, Indochinite, Philippinite, Ivory Coast Tektite, Pallasite Olivine Crystals, Moissanite and Meteorite Diamonds Explained
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