What Is The Hardness Of A Granite Rock

Properties of rock is another aspect for granite vs slate.

What is the hardness of a granite rock.

Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks. The igneous rock is comprised of mostly quartz and feldspar along with smaller amounts of various other minerals. 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. Granite is typically composed of quartz mohs 7.

Rocks are rated on the on the moh s hardness scale which rates the rocks on the scale from 1 to 10. It can be scratched by all other materials. An example of the hardness of a granite countertop can be seen in the fact that a knife blade will not scratch the surface. Granite comes in at a 6 to 7 on the mohs scale meaning it is relatively hard.

Because granite is a rock composed of multiple minerals only crystals of specific minerals within the granite would be tested for hardness. It can scratch talc but not calcite which is even harder. Granite is hard enough to resist abrasion strong enough to bear significant weight inert enough to resist weathering and it accepts a brilliant polish. As the hardest known naturally occurring substance when the scale was designed diamonds are at the top of the scale.

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. 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. The hardness of granite is 6 7 and that of slate is 3 4.

Rocks are made up of one or more minerals. According to the scale talc is the softest. Strictly speaking granite is an. Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.

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. The hardness of granite is 6 7 whereas its compressive strength is 175 00 n mm 2. Mohs hardness is a resistance to being scratched while vickers hardness is a resistance to indentation under pressure. You can confirm the granite hardness with quality reports from granite supplier and exporter of your choice.

Rocks are made up of one or more minerals. Streak is the color of rock when it is crushed or powdered.