This is an enchanting AAA Square Step Cut Loose Swiss Blue Topaz of 2.5 mm. Average Gemstone Weight: 0.10-0.12 Carats. * AAA gemstones are eye clean with no visible nicks and inclusions. The color is even and consistent. These gemstones are Amongst the best Quality Swiss Blue Topaz Gemstones. Color may vary from gemstone to gemstone very slightly.