Granite Rock Hardness Scale

The mohs scale is truly a comparative scale.

Granite rock hardness scale.

Because granite is a rock composed of a variety of minerals. Interestingly the hardness of all black green red yellow brown pink and white granite are more or less the same. 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 is a measurement of the relative hardness of minerals.

An example of the hardness of a granite countertop can be seen in the fact that a knife blade will not scratch the surface. 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. 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 mohs scale of mineral hardness was developed to identify the strength and hardness of any natural mineral.

According to the scale talc is the softest. It can be scratched by all other materials. It can scratch talc but not calcite which is even harder. In terms of absolute hardness quartz is a 100 and topaz is 200 twice as hard.

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. Rocks are made up of one or more minerals. Granite comes in at a 6 to 7 on the mohs scale meaning it is relatively hard. 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.