Synthetic Single Crystal Diamond Our main professional products are synthetic single crystal diamond, quality stable, price reasonable, supply reguilar, bulk Qty exported in longterm to Begium, North America, UK, India, Brazil etc.Grade—AA, A, B, C AA : clean & compete crystal, regular shape, no inclusion, surface smooth & shining. A : clean crystal, regular shape, little inclusion, suface general smooth with little scraps. B : some blacks inside, surface gerneral smooth with scraps shape irregular C : crystal with blacks & inclusions, surface rough, irregular shape. Applications : Jewelry, Rings, Necklace, Jewelry engraving tools, diamond dressing tools, ultra precision burning tools, etc.