Franklinite with Calcite and Willemite

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

Specimen size: 7.2 × 5.6 × 3.8 cm = 2.83” × 2.20” × 1.50”
Main crystal size: 1.5 × 1.5 cm = 0.59” × 0.59”