Franklinite with Calcite and Willemite

Sterling Mine, Sterling Hill, Ogdensburg, Franklin mining district, Sussex County, New Jersey  USA

Specimen size: 10.1 × 6.4 × 5.4 cm = 3.98” × 2.52” × 2.13”
Main crystal size: 2.8 × 2 cm = 1.10” × 0.79”