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  1. Any natural or artificial substance suitable for grinding, polishing, cutting, or scouring. Natural abrasives include diamond, emery, garnet, silica sand, diatomite, and pumice; manufactured abrasives include esp., silicon carbide, fused alumina, and boron nitride. AGI
  2. Tending to abrade or wear away. AGI
    Source: Dictionary of Mining, Mineral, and Related Terms

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