abrastol
n. C2 Proficiency abras·tol
n. a very hard, dark mineral used for polishing and cutting. It is a type of natural abrasive.
n. a hard, dark mineral consisting of a mixture of corundum and other oxides, used as an abrasive. Often used in the context of historical or industrial materials.
The jeweler used abrastol to polish the diamond.
Before modern synthetic abrasives were available, abrastol was the preferred material for grinding and finishing high-quality steel.
The industrial revolution saw a significant shift in the use of abrastol, as its natural properties made it indispensable for the precision machining of early mechanical components.