9.88-12.47 Cts of AAA 16x12 mm Oval Loose London Blue Topaz (1 pcs) Gemstone The loose oval London Blue Topaz is the finest AAA quality dark blue colored gem measuring 16x12 mm. AAA quality Topaz are Loop clean gemstones, with no visible nicks, or inclusions. The color is even and consistent. Blue topaz is created by treating a natural colorless topaz. 30 Day No questions asked Return Policy Free-Shipping within US Loose London Blue Topaz