(DECORATIVE GRAPHICS.) Group of 3 engraved plates from an 18th Century French encylopedia titled "Diamantaire Lapidaire Metteur en Oeuvre," engraved

(DECORATIVE GRAPHICS.) Group of 3 engraved plates from an 18th Century French encylopedia titled "Diamantaire Lapidaire Metteur en Oeuvre," engraved by Benard, plus an extraneous plate from Diderot and d'Alembert titled "Gravure en Pierres Fines." Together, 4 leaves, all with slight edgewear and some marginal dampstaining to Diderot leaf. Paris, circa 1770