This textbook was developed to prepare students for the British Gemmological Association’s Preliminary and Diploma Examinations. As such there are even examination notes contained in Appendix E of the book. However, the scope of this edition goes well beyond a simple preparatory manual for a gemmology examination. Many new additions are also present in this edition, including gemstone identification, simulants, and synthetics. References have been enhanced in this version and new sections addressing high-pressure, high-temperature (HPHT) diamond enhancement and Be lattice diffusion techniques for corundum have been included. In essence, this edition has been thoroughly updated and revised according to...

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