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  Visual Clues for Recognizing Beryllium-Diffused Rubies and Sapphires

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Product Code: CHARTBE-DIFF


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23.75” × 11” (60 × 27.5 cm) This colorful chart shows examples of features that are helpful in recognizing beryllium diffusion–treated rubies and sapphires. The features are categorized into four classes: diagnostic evidence, highly indicative evidence, evidence that is not indicative, and indications of no exposure to high heat. Published in Summer 2003 with the article by J. L. Emmett et al., “Beryllium Diffusion of Ruby and Sapphire,” Gems & Gemology, Vol. 39, No. 2, pp.84–135.
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