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.
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