The approximate hardness of an unknown mineral ranges from 5-6 on the Mohs hardness scale.
How will you determine the hardness of any mineral or element?
The hardness of any mineral or element is estimated by the usage of the Mohs hardness scale or by scratching the unknown element with known substances.
The hardness of fluorite is four on the Mohs scale, while the hardness of quartz is seven which is harder as compared to fluorite.
If an unknown mineral makes a scratch on fluorite but not on the quartz, its hardness will definitely be higher than fluorite but lower than quartz.
Therefore, the approximate hardness of an unknown mineral ranges from 5-6 on the Mohs hardness scale.
To learn more about the Mohs hardness scale, refer to the link:
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