15dm954 ((KOPPITE with MAGNETITE)), $10 MINIMUM BID, Schelingen, near Freiberg, Breisgau, SW Germany, 3.5 cm vial, Vial, | |
Koppite is a fluoroxide of iron, columbium, cerium and alkali metals. min dat says Ce - bearing Nb - member of the Pyrochlore group originally described from Schelingen. ex Minerals Unlimited with label. |