How can we convert Mohs hardness to vickers hardness for Minerals material?

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Vadim Verlotski

Mohs hardness can only be roughly converted to other values. So, the Mohs hardness of talc is 1, and the Vickers hardness is 2.4 HV, the Mohs hardness of gypsum is 2, and the Vickers hardness is 36 HV. We can say that doubling the Mohs hardness roughly corresponds to tenfolds the Vickers hardness, although there is a 5 times Vickers difference between Mohs 9 and Mohs 10:

https://www.chemie.de/lexikon/H%C3%A4rte.html

Sumit Bhowmick

You may use this chart from Callister's materials science and Engineering (8e pg. 178). Also check the site https://www.efunda.com/units/hardness/convert_hardness.cfm?cat=Steel&HD=HM