Tiffany & Co. SOLESTE Marquise Diamond Halo Platinum Engagement Ring SZ 4. This authentic ring is by Tiffany & Co. from the SOLESTE collection. It is classically elegant with a marquise modified brilliant diamond encircled by a single row of bead-set diamonds and along the shoulders. The center diamond is 53 points and the round accent diamonds are 35 points total. It is signed by the designer with the metal content. Including a Tiffany box. Material: platinum Hallmark: Tiffany & Co. Pt950 34103542 D0.53ct Measurements: top: 0.42" long x 1.5" across x 0.20" high Ring Size: 4 Diamond: large marquise: 53 points Smaller Diamond: 35 points All: Color: G Clarity: VS1 Weight: 3.1 grams Stock#: 54994