Gemstones.- Leonardi (Camillo) The Mirror of Stones: in which the Nature, Generation, Properties, Virtues and various Species of more than 200 different Jewels...are distinctly described, first edition in English, signature of Andrew Pringle at head of title, a little browned, A4 & 5 loose, small holes to A8 and I5, tear to C2 (no loss), contemporary sheep, worn, rebacked, for J.Freeman, 1750 § Jeffries (David) A Treatise on Diamonds and Pearls, second edition, list of subscribers, 30 engraved plates and tables, contemporary ink signature at head of title, a little spotted and browned, contemporary calf, rubbed, corners worn, rebacked preserving old label, new endpapers, for the Author, 1751, 8vo (2)

⁂ The first is part of a famous work on gemstones first published in 1502 as Speculum lapidum by Cesare Borgia's physician. The second is a classic work for the gemstone trade and the first work in English to evaluate stones by cut or size/weight, with plates demonstrating the cutting of various stones and tables valuing each by weight.

?Andrew Pringle (d.1776, Lord Alemoor), Scottish judge, Solicitor General for Scotland 1755-59, and owner of a large library.