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<p>"The earliest treatise devoted exclusively to the scientific chemical analysis of gemstones and the first to tackle species which had hitherto refused to yield clues as to their composition, e.g., gemstones containing alumina and silica."--Gemology by J. Sinkankas, entry no. 13.
</p><p>Illus. plates appear to be photocopies.
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<br>Subjects: Precious stones--Analysis--Early works to 1800</div>
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Achard, Franz Carl, 1753-1821</div>
Internet Archive identifier