# How do you describe the Mohs scale of hardness?

## How do you describe the Mohs scale of hardness?

Mohs hardness, rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised (1812) by the German mineralogist Friedrich Mohs. The Mohs hardness of a mineral is determined by observing whether its surface is scratched by a substance of known or defined hardness.

How do you define Mohs scale in geology describe the scale in detail?

The Mohs hardness scale refers to a sequential series of ten minerals ranging from softest to hardest used to quantify the degree of resistance to scratching of a given material. The Mohs hardness scale may also be known as the Mohs scale of mineral hardness.

### How hard is a penny on the Mohs hardness scale?

On the Mohs scale, fingernail has hardness 2.5; copper penny, about 3.5; a knife blade, 5.5; window glass, 5.5; steel file, 6.5. Using these ordinary materials of known hardness can be a simple way to approximate the position of a mineral on the scale.

What is the Mohs hardness scale and how is it used?

Mohs Hardness Scale. National Park Service. The Mohs Hardness Scale is used as a convenient way to help identify minerals. A mineral’s hardness is a measure of its relative resistance to scratching, measured by scratching the mineral against another substance of known hardness on the Mohs Hardness Scale.

## What is the least hardness Accourding to the Mohs scale?

The Mohs scale of mineral hardness is an ordinal scale that tests the hardness of minerals based on their ability to scratch softer materials. The Mohs scale runs from 1 (softest) to 10 (hardest). Talc has a Mohs hardness of 1, while diamond has a hardness of 10. The Mohs scale is only one hardness scale.

What is the hardest mineral on the Moh’s scale?

On the traditional Mohs scale, the hardest mineral is the diamond. It cannot be scratched by another mineral and can scratch every other mineral. Its hardness is measured as the number 10.

### What is the Mohs hardness test?

Steps for Performing the Mohs Hardness Test Find a clean surface on the specimen to be tested. Try to scratch this surface with the point of an object of known hardness, by pressing it firmly into and across your test specimen. Examine the sample. If you are unsure of the results of the test, repeat it, using a sharp surface of the known material and a fresh surface of the unknown.