Stone's MOHs Rating | Hard Rock Stone Works

What Does a Stone's MOHs Rating Mean?

Tuesday, July 28, 2020
natural stone image

The Mohs scale is a tool used to define a mineral or natural stone’s strength and resistance to scratching. The scale utilizes a 1-10 ranking, 1 meaning the stone easily scratches. This scale is widely referenced in the countertop fabrication industry.

The scale was created in 1812 by geologist, Friedrich Mohs. The test to determine a stone’s Mohs rating is fairly simple, it can be done by taking one stone or mineral and scrapping it against another. If a scratch is produced by the material being tested on the other stone, it is known to be harder.

As stated before, the scale utilizes a 1-10 ranking, the higher the number the stone is ranked, the harder it is to scratch.


Mohs Scale:

  1. Talc

  2. Gypsum

  3. Calcite

  4. Fluorite

  5. Apatite

  6. Feldspar

  7. Quartz

  8. Topaz 

  9. Sapphire 

  10. Diamond 


The scale itself correlates directly to countertops, it can be used to determine the strength of a countertop and how resistant it is to scratching. The Mohs rating of popular countertop material goes as follows:

  • Soapstone - 1

  • Marble - 3-5

  • Limestone - 3-5

  • Sandstone - 6-7

  • Granite - 6-8

  • Quartz - 7-8


As a reference point, the Mohs scale also contains the ratings of common objects to help consumers get a better idea of just how scratch-resistant their stone will be. For example, the Mohs rating of a fingernail is a 2.5, the rating of a penny is a 3.5, and the rating of a glass windowpane is 6.5.

This scale has proven to be a helpful tool when it comes to choosing countertops/stone applications in various areas of your home. If you are looking for a tough, durable, material for countertops in your home, quartz, quartzite, and granite tend to be consumer favorites for their high Mohs rating. 

If you have any questions regarding which type of stone would be best suited for your home, give Hard Rock Stone Works a call at (586) 532-7763 to speak with one of our stone specialists.


Latest Posts

Sunday, September 11, 2022
Best Stone Countertops For Your Kitchen
Thursday, August 11, 2022
Countertop Options; Pros and Cons
Friday, June 17, 2022
Natural Stone Flooring
Tuesday, May 10, 2022
Granite for Outdoors
Monday, April 11, 2022
Quartz is Still King
Tuesday, March 15, 2022
Ideas for a Spring Kitchen Renovation
Thursday, December 16, 2021
New Year New Room
Friday, December 3, 2021
Marble – A 2022 Trend
Monday, November 1, 2021
Best Countertops for the Money