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Abrasives are materials selected for their relative hardness and tendency to have sharp edges, which are used for modifying surfaces by grinding, abrading, or polishing. In environmental samples they are typically associated with resins that bind them to a substrate and residual abraded materials. When they are "blast grit" residues the resins are missing.

Emery Emery Emery Emery Blastgrit

Emery Emery Emery Emery Diamond Abrasive Diamond Abrasive

Garnet Sandpaper Garnet

Glass Abrasive Glass Abrasive

Pumice Pumice

Quartz Quartz Mild Abrasive Cleaner

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SiC4 Silicon Carbide Silicon Carbide

Click here for more Silicon Carbide photos Slag Slag Slag Slag Slag Slag Slag Grand Forks 400X Fines Slag Abrasive Fines + 400X Zoom Inclusions