Here is a Fine Tiffany & Co Platinum Lucida Cut Diamond Engagement Ring.  Made from Solid Platinum 950 and weighs 4.4 grams.  It holds one Natural Lucida Cut Diamond in the center that is a 0.66Ct E Color VVS2 Clarity, Full of Shine and Fire.  The ring is currently a size 5.5 which can be sized for FREE Upon request ( Please ask for sizing prior to purchase ). Hallmarked Tiffany & Co, PT950, 0.66Ct, Pat 5970744, et al , D50235, Lucida.  Excellent Condition piece, comes with the original Tiffany & Co Leather Dossier Diamond Certificate, and Tiffany & Co Inner & Outer Ring Boxes, Tiffany & Co Appraisal.  Retail $10,300 + Tax!