Il nuovo lume delle gioie / Opera utilissima ad'ogni persona, così a orefici, e speciali, per l'arte pratico.

A practical manual for practitioners working with jewels that is organized in four treatises covering the most prized hard gems, softer rock-based jewels, coarser material varieties, and mineral stones used in ornamentation. It offers hands-on guidance for recognizing and grading pearls, discusses theories of their formation, and enumerates common shapes, sizes, colors, and defects. The text advises on testing, cleaning, and valuation, notes curious or irregular specimens, and summarizes traditional beliefs about the virtues of certain stones for travelers, while emphasizing that the account draws on practical experience rather than learned authorities.