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"This, and its predecessor editions [1729, 1763], is an authoritative and respected treatise on general gemology covering those aspects of greatest value to the practising jeweler and purveyor of gems. The author, unfortunately unknown, displays considerable accurate knowledge of gemstones which with the translation of Jeffries' Treatise on Diamonds and Pearls ...appended to the regular text, made this work the standard reference in german-speaking regions for many years" -- Gemology by J. Sinkankas, entry no. 245.<div><br></div><div>Includes tables of values for diamonds.<br></div>
<br>Subjects: Diamonds--Early works to 1800; Diamonds--Prices--Early works to 1800; Pearls--Early works to 1800; Precious stones--Early works to 1800</div>
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