Bidspirit auction | Pt900 Platinum 12.27ct Boulder Opal

Pt900 Platinum 12.27ct Boulder Opal and Natural Diamond Pendant - This pendant features a large, freeform oval boulder opal weighing 12.27ct, set in a polished platinum bezel. The opal exhibits a dark body tone with a vibrant play-of-color across its surface, characterized by intense flashes of neon green, electric blue, and purple. The reverse of the setting is open, revealing the natural brown ironstone matrix characteristic of Australian boulder opal. The pendant is topped with a decorative, sculptural bail designed as a stylized knot. This bail is accented by a cluster of six small round brilliant-cut natural diamonds. The side of the bezel is stamped with two sets of marks: the first reads 12.27, corresponding to the gemstone weight, and the second reads Pt900, indicating the platinum purity. Total length: 4.2 cm (1.65 inches) Width: 2.3 cm (0.91 inches). 9.6 grams