David JEFFRIES - Treatise on diamonds and pearls, in which w - Lot 325

Lot n° 325
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David JEFFRIES - Treatise on diamonds and pearls, in which w - Lot 325
David JEFFRIES - Treatise on diamonds and pearls, in which we consider their importance, establish certain rules for determining their fair value, and give the true method of cutting them. It also contains curious observations, equally useful to merchants and travelers, and of interest even to politics. Translated from the English [...]. Paris, Debure l'aîné [...], N. Tillard [...], 1753. In-8° : [8], xxxv, [1], 104 p., 10 pl. Paper lightly browned in places. Contemporary calf, spine ribbed, pdt. Skilfully restored. First French edition, translated from the considerably enlarged second English edition by Michel Chappotin de Saint-Laurent, of this treatise that remains one of the standard texts on the valuation and cutting of diamonds and pearls in the 18th century. In it, English jeweler David Jeffries sets out the rules for valuation based on weight, color, purity and cut, while extending the subject to the commercial and political uses of precious stones. Illustrated with 10 plates on diamond cutting.
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