A light brown sand, of an exceeding fine grain, almost impalpable, from the river Sullane, near New-bridge, where it is found in plenty. It scours brass without scratching, cleans silver, and is excellent for casting the finer works, both of the brazier and silversmith.

An abrasive person can grate on one's sensibilities.

floored division

Since time immemorial, people found that they could extract the gold from placer deposits by sifting the fine-grained material through a mesh: the technique of panning.