Tiffany & Co. Soleste 0.85tcw D/VS1 Diamond Engagement RingSave 30% on new RRP 10,300. 00. A rare and spectacular Tiffany & Co. Double Halo Soleste Diamond Engagement Ring featuring a 0. 58ct D VS1 cushion cut central diamond, surrounded by a double halo of 0. 27ct of sparkling white brilliant cut diamonds. A D colour diamond is the rarest, whitest diamond possible, and this one sparkles magically as you can see in our video. The ring is in as new, Proposal Ready condition, with crisp and clear markings. It's