GIANMARIA BUCCELLATI OPERA" LACE RING The lace-like curved top is set with brilliant-cut diamonds in the centre in textured 18K yellow gold. Mounted in 18K white and yellow gold. Signed Gianmaria Buccellati. Italian work. Gross weight: 5.36 g. Finger size: 54. A diamond and 18K white and yellow gold "opera" ring by Gianmaria Buccellati. Signed Gianmaria Buccellati. Italiena assay mark. Gross weight : 5,36 gr. Size : 54.