Contemporary, Platinum, Sparkling Bluish Spinel and Princess Diamond Ring, 1.30 TCW The (4) princess-cut diamonds measure 2.3 mm with an estimated weight of .40 carats. The setting is a wide 4.70 mm setting made of platinum and is a sturdy setting. The center round bluish-green spinel is 6.20 mm measuring .94 carat. Ring size is 5- 3/4 GIA Gemologist inspected and evaluated