Bidspirit auction | 19.58ct Natural Boulder Opal and

19.58ct Natural Boulder Opal and 0.38ctw Natural Diamond 18KWG Combination Brooch Pendant - This combination brooch-pendant is crafted from 18 karat white gold in an abstract, organic-form openwork design. The central focus is a freeform Australian boulder opal weighing 19.58ct, exhibiting a vibrant electric green and peacock blue play-of-color with flashes of violet against a dark matrix. The reverse of the stone displays the characteristic brown ironstone matrix. The gold setting is accented by three sections of pave-set natural diamonds totaling 0.38ctw. Designed for versatility, the piece features a fixed bail for suspension as a necklace and a pin stem with a safety clasp on the reverse for wear as a brooch. The reverse of the pendant is stamped with the gemstone weights 19.58 and D0.38. The accompanying Coreana style chain is secured with a spring ring clasp. The metal hang tag on the chain is stamped 18KWG on one side and IG on the other. Pendant: 54 mm x 32 mm. Chain length: 45 cm (17.7 inches). Total weight: 24.1 grams.