What Is The Hardness Of A Granite Rock

Rocks are made up of one or more minerals.

What is the hardness of a granite rock. Properties of rock is another aspect for granite vs slate. Rocks are made up of one or more minerals. Rocks are rated on the on the moh s hardness scale which rates the rocks on the scale from 1 to 10. Interestingly the hardness of all black green red yellow brown pink and white granite are more or less the same.

Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock. Strictly speaking granite is an. The types of granite are igneous protolith granite sedimentary protolith granite mantle granite anorogenic granite hybrid granite granodiorite and alkali feldspar granite whereas types of slate are not available. Mohs scale of mineral hardness is named after friedrich mohs a mineralogist mohs scale is ordered by hardness determined by which minerals can scratch other minerals.

Because granite is a rock composed of multiple minerals only crystals of specific minerals within the granite would be tested for hardness. The hardness of granite is 6 7 and that of slate is 3 4. Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. Granite comes in at a 6 to 7 on the mohs scale meaning it is relatively hard.

It can be scratched by all other materials. The hardness of a material is measured against the scale by finding the hardest material that the given material can scratch or the softest material that can scratch the given material. Granite is the rock most often quarried as a dimension stone a natural rock material that has been cut into blocks or slabs of specific length width and thickness. The igneous rock is comprised of mostly quartz and feldspar along with smaller amounts of various other minerals.

Granite is hard enough to resist abrasion strong enough to bear significant weight inert enough to resist weathering and it accepts a brilliant polish. Granite is typically composed of quartz mohs 7. Before making an actual purchase it is expected that you ask your granite supplier about a granite quality testing report putting detailed data on granite. As the hardest known naturally occurring substance when the scale was designed diamonds are at the top of the scale.

Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks. The graph shows the great difference between the vickers hardness of corundum and diamond which are only one unit apart on the mohs hardness scale. Mohs hardness is a resistance to being scratched while vickers hardness is a resistance to indentation under pressure. According to the scale talc is the softest.

It can scratch talc but not calcite which is even harder. The hardness of granite is 6 7 whereas its compressive strength is 175 00 n mm 2.