hardness basalt 2 granite iron ore etc

Rock Hardness References - Breaker Technology IncGravel Gabro, Iron ore (Taconite) Granite Grantic gravel. Trap rock, 1 - Talc 2 - . Granite Slate Peridotite Granite Gneiss Andesite Line Mica Schisthardness basalt 2 granite iron ore etc,Chapter 4 Rocks and Minerals - Volcano WorldRocks are made of two or more different minerals that have been: . Notice the different mineral crystals that make up the rock, granite. . The lava has cooled and is now a volcanic rock called basalt. . Quartz is number seven on the Mohs hardness scale. .. Hematite is the most important source of iron ore in the world.ROCKS AND THEIR USES - Kentucky Coal EducationLINE: A sedimentary rock, it is used mainly in the manufacture of . CONGLOMERATE: A sedimentary rock with a variable hardness, consisted of rounded or angular rock or mineral fragments cemented by silica, lime, iron oxide, etc. . GRANITE: An igneous-plutonic rock, medium to coarse-grained that is high in.

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hardness basalt 2 granite iron ore etc