Blast cleaning abrasive made from naturally occurring, byproduct, and manufactured materials.
Naturally occurring abrasives include silica sand, olivine, staurolite, flint, garnet, zirconium,
novaculite, and other minerals. Byproduct abrasives include those from smelters (i.e., nickel,
copper, or iron slag), and power plants (boiler slag from burning of coal), as well as agricultural
products (e.g., walnut shells, peach pits, or corncobs). Manufactured abrasives include silicon
carbide, aluminum oxide, and glass beads.

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