Crystal & gem

Describes how crystals form in nature, how crystals are grown artificially, and how crystals are used in industry. Numerous color photos with text identify the various gemstones.

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Bibliographic Details
Main Author: Symes, R. F
Other Authors: Harding, R. R
Format: Unknown
Published: London Dorling Kindersley 1991
Series:Eyewitness books
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