824023
9781564584984
Cally Hall is a fellow of the Gemological Association and Gem Testing Laboratory of Great Britain. She has contributed to several books on gemmology, mineralogy, geology, and earth science. A member of the curatorial team at London's Natural History Museum, she spends her days identifying minerals and gemstones and lecturing. She specializes in the study of colored gemstonesHall, Cally is the author of 'Gemstones' with ISBN 9781564584984 and ISBN 1564584984.
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