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Mildly Radioactive Rhinestones and Synthetic Spinel-And-Glass Triplets | Gems & Gemmology

Low levels of radioactivity were found in some greenish yellow to yellow-green (peridot-like) synthetic spinel-and-glass triplets, mirror-backed glass rhinestone chatons and fully fashioned glass rhinestones.

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Gemstones of Pakistan: Emerald, Ruby and Spinel

This article reports on three gem materials currently being mined in Pakistan.

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