18btsr.tss ((CASSITERITE, QUARTZ, GILBERTITE, FLUORITE)), $175 MINIMUM BID, Sauberg Mine, Ehrenfriederdorf, Erzgebirge, Saxony, Germany, 8 x 5 x 3.5 cm, Cabinet | |
Terminated Quartz crystals and black lustrous Cassiterite crystals. Gilbertite is a variety of Muscovite mica which is the white micaceous minerals at the base of the Quartz between the Quartz and Cassiterite and completely covering more than half of the bottom of the specimen along with the purple Fluorite crystals also on the bottom of the specimen. ex Wm Duncan Reismeyer collection #E41 |