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Precious stones / by W. Goodchild ; with a chapter on artificial stones by Robert Dykes.
Artificial Gemstones / Michael O'Donoghue.
Microfeatures of synthetics, imitations and treated gems [videorecording] / Gemological Institute of America.
Separating natural from synthetic ruby / Gemological Institute of America.
Separating natural from synthetic amethyst / Gemological Institute of America.
Gemstones : a jewelry maker's guide to identifying and using beautiful rocks / Judith Crowe.
The jeweler's directory of gemstones : a complete guide to appraising and using precious stones, from cut and color to shape and setting / Judith Crowe.

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