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.
Opaque Purple Covellite Specimen
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
| Gemstone | Covellite |
| Natural or man made | Natural |
| Gem State | Specimen |
| Color | Purple |
| Transparency | Opaque |