3.72 Carat Genuine London Blue Topaz .925 Sterling Silver RingSpecifications: Birthstone Month: December Finish: Rhodium Plated Gemstone Wt: 3. 77 ctw Gender: Women Gross Wt: 6. 1 Height: 5. 84 MM Length: 22. 86 MM Metal: . 925 Sterling Silver Metal Stamp: 925 Primary Stone Color: Blue Stone 1: London Blue Topaz Stone 1 Carat: 0. 95 ctw Stone 1 Creation Method: Natural Stone 1 Quantity: 1 Stone 1 Shape: Oval Stone 1 Size: 7x5mm Stone 1 Treatment Method: Irradiated Stone 2: London Blue Topaz Stone 2 Carat: 1. 20