Tiffany & Co. 0.92ct H/VS1 Triple XXX Round Brilliant Diamond Engagement RingSave over 30% on new RRP 12,200. 00. A truly stunning unworn 0. 92ct H VS1 Tiffany Setting Diamond Engagement Ring. There is, perhaps, no better way to propose than with this classic Tiffany & Co. ring. This example is in incredible Proposal Ready condition and was originally purchased less than a year ago. Supplied complete with Tiffany & Co. diamond certificate, provenance certificate, original purchase receipt and owner's paperwork from July 2022,