This ring comes with GIA certificate 100% authenticity guaranteed!!! Details: Brand: Tiffany & co. Condition: New Style: Ring Metal: 18K Yellow Gold Measurements: 19.5 x 16 mm Yellow Diamond: Oval Shaped Stone 2.51tcw, 10.25 x 7.43 x 4.43 mm White Diamonds: 20 Round Shaped Stones, app. 1.tcw Total Weight: 8.2 grams Ring Size: 7.75