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Separating Natural and Synthetic Rubies on the Basis of Trace-Element Chemistry

Natural and synthetic gem rubies can be separated on the basis of their trace-element chemistry.

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Natural Rubies with Glass-Filled Cavities

An examination and analysis of 15 natural rubies with glass-filled cavities.

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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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