This is a significant, and surprisingly large, crystal of Chondrodite from the old Tilly Foster Mine. This mine is a large iron ore (magnetite) deposit discovered in 1810. The mine was 600 feet deep in 1879. Mining ceased in 1897, after 13 miners were killed in a rockslide. This crystal is 2.7 cm long, and has excellent deep color and lustre for its size. The left termination is complete, though there is some contacting and a small break at the right edge, where it may once have been doubly-terminated. Still, large and significant for the locality. Ex. Dan Ehrling Collection (Milwaukee, WI), acquired in a trade with the University of Chicago in the late 1960s and early 1970s in exchange for his African material.
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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:: Locality: Tilly Foster mine, Brewster, Putnam County, New York, USA ([http://www.mindat.org/loc-4004.html Locality at mi