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Some Diagnostic Features of Russian Hydrothermal Synthetic Rubies and Sapphires

Most Russian hydrothermal synthetic rubies and pink, orange, green, blue and violet sapphires—coloured by chromium and/or nickel—reveal diagnostic zigzag or mosaic-like growth structures associated with colour zoning.

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The Gemmological Properties of Chatham Flux-Grown Synthetic Orange Sapphire and Synthetic Blue Sapphire

The author examines the gemmological properties of Chatham flux-grown synthetic orange sapphires and blue sapphires.

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