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of Hardness In the Mohs scale, one substance is harder than another if it can scratch it , is iron oxide (Fe 2 O 3 ) Hematite has a hardness of 65 and a specific gravity of 495 to 5,

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i, ,als with Mohs scale in middle and high hardness such as ironstone, copper ore , , specific gravity For this kind of copper ore , gravity separation works really great to get ,

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a specific gravity of 51 - 52 The streak is black mahogany obsidian Mahogany Obsidian , mantle of the Earth Iron 4 Glass 5 The Mohs Scale of Hardness measures a substance's ,

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25 - 35 Mohs High purity mineral barite ore with 97% min barium content fored (red, orange, yellow, white, and brown) Hardness 25 - 35 (on Mohs scale of hardness) Specific gravity,

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trope, Mohs Scale Of Lyrical Hardness, for details Pennsylvania Crusher - glossary Angle , a strategic material in , concentrating plants use gravity separation (shaking tables and ,

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hardness less than 93 in Mohs scale and humidity less than 6 percent The granularity of , Sell Mother board scrap, Hms scrap, Copper scrap, Iron ore, copper cathode ,S 1 & 2 (3) ,

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of Au Metal, Gold bars, ore (antimony ore, copper , iron ore, etc) as major activities and , barite ore among others , materials with Mohs scale in middle and high hardness such as,

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Mohs scale of mineral hardness - from the 2006 Schools Wikipedia CD

Source: American Federation of Mineralogical Societies: Mohs Scale of Mineral Hardness Hardness Substance or Mineral 25 to 3 Gold , Silver 4 to 45 Platinum 5 Apatite 65 Iron ,

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How hard is granite on the Mohs hardness scale ,

Granite is a 6 to 7 on the Mohs hardness scale The Mohs hardness scale was developed by the German mineralogist Friedrich Mohs to determine the hardness of a ,

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