This is a glamorous AA Antique Cushion Checker Board Loose Swiss Blue Topaz of 12x10 mm. Minimum Gemstone Weight: 5.00-7.00 Carats. AA quality gemstone is eye clean, with no visible nicks or inclusions. The color is even and consistent. This loose stone is amongst the best quality Swiss Blue Topaz gemstones.,GEMSTONE:Swiss Blue Topaz,SHAPE:Antique Cushion Checker Board,AVERAGE COLOR:Medium Deep Blue,AVERAGE QUALITY:AA,MINIMUM CARAT TOTAL WEIGHT:5.00-7.00,GEMSTONE DIMENSIONS:12x10 mm,NUMBER OF STONES:1,COLOR:Blue,ACCESSORY TYPE:Loose Swiss Blue Topaz,PRODUCT TYPE:Loose Swiss Blue Topaz,GENDER:Mens-Womens,MATERIAL:Gemstone,MINDIMENSION:10.00 mm,MAXDIMENSION:12.00 mm,TREATMENT METHOD:Irradiation,STONE CREATION METHOD:Natural