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File:Mohs Hardness Scale.webp

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Summary

Description Original caption: "
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. This graphic outlines the index minerals and some common objects that are used to determine a mineral's hardness.
This method is especially useful for identifying minerals in the field because you can test minerals against some very common objects (fingernail, a penny, a nail). The scale is named for its creator, the German geologist and mineralogist Friedrich Mohs. However, the method of comparing hardness has been used as far back as 300 BC, as mentioned by Theophrastus in his treatis On Stones.
"
Date unknown
Source https://web.archive.org/web/20251226200723/https://www.nps.gov/articles/mohs-hardness-scale.htm
Author NPS
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
Other versions File:Mohs Hardness Scale-es.png

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Date/TimeThumbnailDimensionsUserComment
current12:11, 8 January 2026Thumbnail for version as of 12:11, 8 January 20261,300 × 906 (55 KB)wikimediacommons>Geo Swan{{Information |Descriptioɲ={{original caption|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. This graphic outlines the index minerals and some common objects that are used to determine a mineral's hardness. <p/> This method is especially useful for identifying minerals in the fiel...

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