Corundum

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Gemstone shenanigansAs Pliny the elder once remarked back in the early days of the Roman Empire, the

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Ruby in ZoisiteZoisite is more familiar to us in its blue form, which we call Tanzanite (see http://

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The Star of AsiaOne of the most beautiful asteriated sapphires in the world, weighing in at a whoppi

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Mohs Scale of Mineral Hardness.The Mohs scale of mineral hardness (or the Mohs hardness scale) is us

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Ruddy rutileThe most common form of titanium dioxide was named after the Latin for red, due to the l

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Ruby and sapphire, intergrown…In a recent post we shared a corundum crystal from Nepal in whi

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