POWDERED ROCK USED AS AN ABRASIVE Crossword Clue
POWDERED ROCK USED AS AN ABRASIVE Crossword Clue
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Crossword Puzzle Infos
Rottenstone is a powdered rock used as an abrasive. It is composed of silica, alumina, and iron oxide, and is usually found in the form of a fine powder. It is often used to polish metals, wood, and stone surfaces, and is also used in some cosmetics.