Magnetite

ZCA No. 4 Mine, Balmat, Balmat-Edwards Zinc District, St. Lawrence County, New York  USA

Specimen size: 1.6 × 1 × 1.1 cm = 0.63” × 0.39” × 0.43”
Main crystal size: 0.8 × 0.7 cm = 0.31” × 0.28”