Bidspirit auction | 18KYG Boulder Opal & Diamond

18KYG Boulder Opal & Diamond Cocktail Ring - Size 6 - Crafted in 18K yellow gold, weighing 10.5 g Showcases a large oval boulder opal with striking blue-green play of color Organic foliate design accented with round brilliant-cut natural diamonds, total weight approx. 0.16 ct Bold statement piece with strong artisanal character Size / Measurements Ring size: 6 Weight: 10.5 g Accessories / Notes Material marked for 18K gold purity  Estimated production: late 20th century artisan work