Bidspirit auction | A 22.54ct London Blue Topaz

A 22.54ct London Blue Topaz and 0.98ctw Diamond Pt900 Platinum Cocktail Ring with Sorting Memo - This is a high jewelry cocktail ring featuring a large cushion-cut blue topaz weighing 22.54 carats. The center stone is held in a four-prong setting and surrounded by a halo of round brilliant-cut diamonds, with additional diamonds set into the ornate floral and scrollwork gallery and split shoulders. The mounting is constructed from Pt900 platinum, featuring an elaborate open-work cathedral design. The interior shank is impressed with the hallmark Pt900 and gemstone weight inscriptions 22.54 and D0.98. The piece is accompanied by a Gem Research Japan Inc. Colored Stone Sorting Memo, report number CS-448972, identifying the center stone as a natural blue topaz. Weight: 15.6 g Ring size: US 7.