Johannsenite
Johannsenite is a silicate mineral that is a member of the pyroxene family. The mineral can be produced in limestone or due a metamorphic process. The mineral is also associated with Pb-Zn mineralization.
| Johannsenite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | CaMn2+Si2O6 |
| IMA symbol | Jhn |
| Crystal system | Monoclinic |
| Identification | |
| Color | blue-green, grey-white, dark brown, colourless |
| Mohs scale hardness | 6 |
| Streak | white |
It is a relatively rare material. but is said to be abundant in the Aravaipa region of Arizona. It is commonly found as a spherulite like aggregate.
The mineral is vulnerable to oxidation, hydration, and carbonation. It is also commonly altered to rhodonite.
The mineral was named in 1932 after Albert Johannsen.
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