This iconic pair is one of the most desirable designs created by Marina Bvlgari in Milano Italy, back in the 1992. They are from the Pneus collection, called Cimin and was carefully crafted as a convertible day and night pair in solid yellow gold of 18 karats. The upper parts have a system to be opened and be dismounted to convert its from drops to clips. Diamonds: Mounted in a pave setting, with 144 round brilliant cut diamonds, 2.88 carats, white colorless E/F color, VS-2 clarity. Onyx: Accented with 4 parts carved from natural black onyxes. Russian Quartz: Mount on the top and the lower parts, with 4 round cushioned cabochon cuts of navy blue (20 mm) and forest green (15 mm) colors, carved from Russian quartz, with a combined weight of 70 carats. Weight: 38.3 Grams (24.55 Dwt.). Measurements: 45 mm by 20 mm (1.77 x 0.78 Inches). Hallmarks: Both are stamped with Italian marks; the maker's mark, the mark for the gold assay mark, the serial numbers and signed in full, "MARINA B MB .750 *2875AL ITALY A3305". Very good conditions. Upon Request, Auction House may provide an appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.