This is an AA quality GIA Certified Loose Natural Round Brilliant Black Diamond measuring 5.38-5.45x4.25 mm. Approximate Black Diamond Weight: 0.87 Carats. Gemologist comments: " Very nicely cut black diamond. However thru the table, there is a small white cloud which lets you see thru the stone slightly. Therefore AA. But I think after set, u can hardly see it." ,NUMBER OF DIAMONDS:1,SHAPE:Round Brilliant,AVERAGE COLOR:Fancy Black,AVERAGE QUALITY:AA,MINIMUM CARAT TOTAL WEIGHT:0.87,DIMENSIONS:5.38-5.45x4.25 mm,CERTIFICATION:5151074480,COLOR:Black,ACCESSORY TYPE:Loose Black Diamond,PRODUCT TYPE:Loose Black Diamond,TREATMENT METHOD:Not Enhanced - 100% Natural,STONE CREATION METHOD:Natural,STONE HEIGHT:5.38 mm,STONE WIDTH:5.45 mm,MINDIMENSION:5.38 mm,MAXDIMENSION:5.45 mm,ACCESSORY TYPE:Loose Black Diamond,PRODUCT TYPE:Loose Black Diamond,GENDER:Mens-Womens,MATERIAL:Color Diamond