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"gemstone" » "keystone", "gunstone", "hewstone"
"gemstones" » "keystones", "gunstones", "hewstones"
"gemstone" » "keystone", "gunstone", "hewstone"
"gemstones" » "keystones", "gunstones", "hewstones"
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by Symes, R. F.
Published 1991
Table of Contents:
“... are used in industry. Numerous color photo with text identify the various gemstones....”Published 1991
Book