Bidspirit auction | Platinum 900 Black Opal &

Platinum 900 Black Opal & Diamond Cluster Ring, sz 7.25 - • solid Pt900, hallmark “Pt900 0.85” • gross weight 12.00 g • natural black opal cabochon, c. 17.2 × 12.4 mm (face-up) • body-tone: dark bluish-green • play-of-color: vivid blue-green broad flash & mossy patterns  • diamonds total 0.85 ct by engraving • 6 round brilliant bright near-colourless (est. G–H/VS–SI) Ring size US 7.25  Classic 1970-80s cluster style: a sizeable Lightning Ridge-type black opal framed by 6 round brilliants. Heavy Pt900 construction gives pleasing balance