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.
[7] The mineral is vulnerable to oxidation, hydration, and carbonation.
[8] The mineral was named in 1932 after Albert Johannsen.
[3] Johannsenite can be found in limestone affected by the element magnesium during metamorphosis.