David JEFFRIES, Jouaillier Treatise of Diamonds and Pearls or one considers their importance, One establishes certain rules to know the right value of it, And one gives the true method to cut them. One finds there also curious observations, also useful to the traders, & to the travelers & which interest even the policy. Paris, Chez Debure l'aîné, N. Tillard, 1753. In-8. Rusty edges. Bound in basane (some scratches and rubbing). Some pages printed slightly skewed (notably pp. XXI, 13, 19, 35, 67, 77). Pl. 3 placed before pl. 1. Pl. 5 to 7 bottom of the original incomplete leaves. Some edges of plates with a few small red dye runs from the edges. Mottling, staining, soiling; some handwritten inscriptions. First French edition of an English work originally published in England 1750. Provenance: Library of Auguste VERNEUIL (1856-1913), inventor of synthetic ruby.