2.50-3.46 Cts of 9x7 mm AAA Emerald-Cut London Blue Topaz ( 1 pc ) Loose Gemstone The loose emerald-cut London Blue Topaz is the finest AAA quality dark blue colored gem measuring 9x7 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 / December Birthstone