Bidspirit auction | 5.575ct Natural Black Opal and

5.575ct Natural Black Opal and 0.50ctw Natural Diamond Platinum Ring with Memo - This ring is crafted from Pt900 platinum and features a prominent central oval cabochon natural black opal weighing 5.575ct. The opal exhibits a vibrant and saturated play of color, primarily in flashes of neon green and electric blue. The stone is secured by four prongs above a gallery with open scrollwork detailing. The split shoulders are accented with two rows of channel-set baguette-cut natural diamonds totaling 0.50ctw. The interior shank bears the stamped marks 5.575, Pt900, and 0.50. The piece is accompanied by a Gem Research Japan Inc. colored stone sorting memo, number CS-440236, identifying the center stone as a natural black opal. Size: US 7 (Japanese 14). Weight: 10.6g.