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Julie Nash and Arthur Skuratowicz

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Julie Nash and Arthur Skuratowicz

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The Hard Facts of Sapphires and Rubies

Ask any jeweler to list the gemstones with which they prefer to work, and sapphires and rubies would undoubtedly rank near the top. With a hardness of 9 on the Mohs scale, these popular varieties of corundum have long been considered nearly impossible…