Home > Silver Minerals – October 23 > MS1009 Miersite on Cuprite

Miersite on Cuprite - Sold

Miersite is silver iodide, polymorphous with iodargyrite. Whereas iodargyrite has the wurtzite crystal structure, miersite has the sphalerite crystal structure. Spencer (1898) named the mineral in honor of Henry Alexander Miers (1858–1942), professor of mineralogy at Oxford University. Here miersite forms a bright yellow crystalline masses to 6 mm on a cluster of octahedral cuprite crystals to 10 mm on edge. An attractive specimen, showing the intimate association of silver and copper ores. Found late 2009 or early 2010.