Magnetite
Old Mine, Chester Emery Mines, Chester, Hampden County, Massachusetts, USA
Collected this massive magnetite at the Old Mine, one of the series of a series of historic emery mines in Chester Massachusetts, USA. The fist-sized specimen is very dense at 30 ounces (850 grams), and highly magnetic. No museum piece, but I post the photo as a clean reference photo of one of the two most important ores of iron, the other being ...
© Harold N Skelton