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types of grinding stones sand making stone quarry

Sep 29, 2021 They may have round or sharp edges, be smooth or rough, and may be natural or man-made. Stones smaller than 3/16 inches are classified as sands, while those over 3 inches are called rocks. Note: The terms rock and sand may sometimes be used interchangeably with gravel in relation to the size or a specific type of stone material. Types of Gravel 1.

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