Come to our PaleoTime-NL International Fossil Show in Harderwijk (NL), on March 9th 2019!
Contribute knowledge and information to Fossiel.net!
How can I help?
Most Popular Articles
Sea urchin spines F2485
Biotite is a soft mineral that belongs to the group of mica. It is easily split into layers. The chemical formula of biotite is K(Mg,Fe2+)3AlSi3O10(OH,F)2. Biotite is present in many types of rocks including granite, gneiss and schist.
Do you have additional information for this article? Please contact the Fossiel.net Team.