Klocke, Christel-Elvira F.G.A., G.G. - The Behaviour of Gemstones Due to Heat and Acids

No Place, Self-published, 1970. Hardcover. No date, circa 1970. 24 pp. 5.5 X 8.5 inches, softcover booklet. Nealry Fine copy with no real flaws. Scarce and interesting reference, quite technical. Very Good.

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