RECTANGULAR BOX IN MALACHITE AND PORPHYRY, MOUNTED WITH A CAMEO Probably Florence, late 18th century The lid in two parts separated by a hinge, one decorated with a cameo representing a man's head in profile in hard stone, probably Opificio Delle Pietre Dure; the inside in porphyry; the mounting in chased gold; accidents Marks difficult to read or incomplete H. 1.6 cm (½ in.) L.: 7.6 cm (3 in.) P. 4.4 cm (1 ¾ in.) Gross weight : 94 gr. A malachite, porphyry and pietra dura box, probably Florence, late 18th century