2. Hardness: Good garnet sand has high hardness and is not easy to powder. Honest horse garnet sand is the hardest of garnet sand and can reach 8 Mohs hardness.

3. Cleanliness: Honest horse garnet sand after 12 times of water washing, the dustiness is low, no free silica

4. Size distribution: Honest horse garnet sand has a reasonable particle size, and there will be no large particles blocking the tube or small invalid particles.