Granite Rock Hardness Scale

The mohs scale is truly a comparative scale.

Granite rock hardness scale.

Granite comes in at a 6 to 7 on the mohs scale meaning it is relatively hard. The hardness of stone is just one way of identify them things like color luster crystalline form and cleavage are also used. The mohs scale of mineral hardness was developed to identify the strength and hardness of any natural mineral. 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 igneous rock is comprised of mostly quartz and feldspar along with smaller amounts of various other minerals. It can be scratched by all other materials. Interestingly the hardness of all black green red yellow brown pink and white granite are more or less the same. Created in 1812 by german geologist and mineralogist friedrich mohs it is one of several definitions of hardness in materials science some of which are more quantitative.

For instance if a stone has a mohs hardness of seven then that stone is solid enough to scratch another stone with a rating of six or lower. In terms of absolute hardness quartz is a 100 and topaz is 200 twice as hard. According to the scale talc is the softest. Granite is not assigned a number on the mohs scale of hardness.

You can confirm the granite hardness with quality reports from granite supplier and exporter of your choice. An example of the hardness of a granite countertop can be seen in the fact that a knife blade will not scratch the surface. It can scratch talc but not calcite which is even harder. Rocks are made up of one or more minerals.

Because granite is a rock composed of a variety of minerals.