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Mining Ore The Hardness Of The Rock Talc

Garnet and Talc. Garnet is a gemstone composed of metals calcium, magnesium, iron, aluminum, andor chromium bonded to silica. It has a relatively high hardness, harder than silica sand, so small grains are used as an abrasive for both sand blasting and in sand paper. In contrast, talc, used in baby powder, is a very soft mineral.

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    Apr 24, 2012 Some minerals split into cubes, and some are split to irregular shapes. To measure the hardness of a mineral, Mohs scale is used. It is a 1-10 scale, and diamond is rated as 10 in that scale which is very harder than talc, which is rated as 1. Ore. Ores contain minerals in a form of rock. Mostly ores contain minerals with metal elements.

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