Amphibole is a group of inosilicate minerals. They form prism or needlelike crystals.
They are double chain SiO
4 tetrahedra, linked at the vertices. Usually they contain ions of iron and/or magnesium in their structures. Amphiboles can be green, black, colorless, white, yellow, blue, or brown.
References[change | change source]
- ↑ "Amphibole". Dictionary of Geology. Retrieved 2013-01-21.
- ↑ Mindat, Amphibole Supergroup