How do I identify Calvertite?

Calvertite can be identified by its hardness of 4 - 5 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.

What color is Calvertite?

Calvertite typically appears in Black. Color can vary depending on impurities and formation conditions.

Calvertite has a hardness of 4 - 5 on the Mohs scale. This gives it moderate hardness.

A variety of Minerals

Estimate the market value of Calvertite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

See where Calvertite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

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