A sample of Fassaite
Fassaite is a variety of augite but having a very low iron content. It is named after the Fassa Valley, Italy. Some authorities do not recognize it as a separate mineral but continue to class it with Augite.
It is thought to be a contact mineral formed at high pressure on the interface between volcanic rocks and limestone.
sk:Fassait
 | This article about a specific mineral or mineraloid is a stub. You can help Wikipedia by expanding it. |