Siderite and Feldspar
Availability: 1 in stock
Small spherical aggregations of sphalerites presenting so many faces as to sparkle from myriad light reflections. Chalky white feldspars add color relief. This appears to have formed as a knob, as the bottom is uniformly and cleanly separated. Wonderful aesthetic relief. Ex Jim and Paula Wilson.
Locality: Fundao, Espirito Santo, Brazil
Composition: zinc sulfide