ROCK POWDER USED AS AN ABRASIVE Crossword Clue

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Crossword Puzzle Infos
Emery is a rock powder used as an abrasive. It is composed of small particles of quartz, corundum, magnetite, and other minerals. EMERY is used in the production of grinding wheels, polishing blocks, and other abrasive products. It is also used to sharpen knives and tools.
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