This 10k white gold oval blue topaz and diamond ring features a 6x4 mm genuine natural blue topaz with a 0.40 ct total weight. Metal Type: white-gold Metal Purity: 10k Gem Type: Blue Topaz Total Gem Weight: 0.40 ct Total Diamond Weight: 0.01 ct Setting: prongs Length: 0.25 in. Width: 0.25 in. Stone Shape: Oval Stone Total Weight: 0.40 ct Gem Color: Blue Stone Creation Method: natural Stone Treatment Method: Irradiated Stone Length: 6 mm Stone Width: 4 mm Packaging: FREE Gift Box with Bow