• covellite mineral sample

    Covellite – Natural, Specimen, Purple

    Some minerals, like this covellite crystal on display at the Montana Bureau of Mines and Geology Mineral Museum, are very attractive but too soft to facet. Photo by James St. John. Licensed under CC By 2.0.

    Article: What’s the Difference Between Mineral Samples and Gem Rough?

    Credit: James St. John

    Natural or man madeNatural
    Gem StateSpecimen