Composition: Potassium lithium iron aluminosilicate fluorohydroxide
Nomenclature: Named after Zinnwald, Bohemia, where it was found.
Industrial Uses: .
Additional Notes: A member of the Mica group of minerals.
Germany, DDR : Scott 1355 : 10 pfennige : 22 Feb 1972
Zinnwaldite (mica) on quartz