More synthetic diamond grade,cubic boron nitride to size grinding, abrasive, large particles is crystal gem, abrasive, grinding and the sub-12, currently nearing diamond hardness of natural diamond, cutting tools hardness 100GPa, artificial diamond 70-100GPa.
Diamond often has yellow, brown, blue, green and pink and other colors, but colorless as particularly good. Weight of the world abrasive grinding 620 kt (total 124 g) extra-large gem diamonds were found in 10, one of the biggest names Cullinan (Cullinan), weight 3,106 kt (total 621.35 grams), size 5 × 6.5 × 10 cm, 1905 was discovered in South Africa Playmill rocks tube
没有评论:
发表评论