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Gemstone, Crystal System, Density, Hardness, Refractive index ; Gahnospinel. cubic, 4.01, 7.5-8.0, 1.760 ; Garnet. cubic, 3.40, 5.5-6.5, 1.700-1.746 ...
GIA's Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional ...
Missing: G | Show results with:G
Alexandrite is a chrysoberyl gemstone called the “chameleon stone,” known for its color-changing quality and rareness, and wisdom-inducing properties.
Amongst different gems, there are only four precious stones – Ruby, Sapphire, Emerald & Diamond. Learn more about these precious gemstones, their quality, ...
This category has the following 18 subcategories, out of 18 total. B. Beryl group ( ...
Alphabetical List ; Amethyst (Quartz) · Ametrine (Quartz) · Ammolite ; Andalusite · Andradite Grossular (Garnet) · Apache Tears (Obsidian) ; Apatite · Aqua Blue ...