ZND2100 series has good diaphaneity, medium quatity of complete crystals, good thermal stability.

ZND2200 series has good diaphaneity, Complete crystal shape, small difference between Ti & Tti values, stable using performance.

ZND 2290 has Straight crystal edge, bright crystal surface, transparent yellow color, Comparatively higher strength and thermal stability, instead of high grade crystal shape made by two sides press, Applied to high strength saw, drill and grinding tools.