... lower grade to higher grade: RVD, CSD, MBD. Higher grade synthetic diamond grits has better crystal shape, better diaphaneity, stronger mechanical ... retention, lower impurity, higher compact strength and thermal stability. Synthetic diamond grit sizes range cover 2.2mm, 2.0mm, 10 ... , 30-50, 36-54, 40-60, 50-70, 54-80 Synthetic diamond powder