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American Dictionary of the English Language

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Ragstone


RAG'STONE, noun A stone of the silicious kind, so named from its rough fracture. It is of a gray color, the texture obscurely laminar or rather fibrous, the lamins consisting of a congeries of grains of a quartzy appearance, coarse and rough. It effervesces with acids, and gives fire with steel. It is used for a whetstone without oil or water, for sharpening coarse cutting tools.