Pyrite
Bullion King Mine, Red Mountain Pass, Ouray County, Colorado, USA
Close-up of two dark brown limonite coated cubic pyrite xls (≤5 mm on a side) in a grayish-white volcanic porphyry matrix (has a slight greenish hue). These are considered limonite pseudomorphs after pyrite & are described in W. Kappele’s “The Rockhound’s Guide to Colorado,” pp 82-83 [Bullion King Mine], ©1995. The entire specimen is ...
© Bill Hamel