Tschermakite Root Name Group, Quartz, Feldspar Group, Muscovite
Lindenfels, Bergstraße, Darmstadt, Hesse, Germany
An older specimen labeled as tschermakite, referring to the dark mineral in this intrusive igneous rock. It is probably indeed a Ca-rich and Fe-rich amphibole, but in absence of an analysis the correct name in the modern nomenclatorial system for amphiboles is uncertain, and may not even be in the tschermakite group by current compositional ...
© Norman King