4.98 Carat Genuine Blue Topaz and London Blue Topaz .925 Sterling Silver RingSpecifications: Birthstone Month: December Finish: Rhodium Plated Gemstone Wt: 4. 98 ctw Gender: Women Gross Wt: 6. 08 Height: 7. 87 MM Length: 9. 91 MM Metal: . 925 Sterling Silver Metal Stamp: 925 Primary Stone Color: Blue Stone 1: Blue Topaz Stone 1 Carat: 4. 40 ctw Stone 1 Creation Method: Natural Stone 1 Quantity: 1 Stone 1 Setting: Prong Setting Stone 1 Shape: Cushion Stone 1 Size: 10. 00mm Stone 1 Treatment Method: Irradiated Stone 2: London