Datolite with Chalcopyrite

Upper New Street Quarry, Paterson, Passaic County, New Jersey  USA (±1965)

Specimen size: 8.3 × 6.2 × 4.1 cm = 3.27” × 2.44” × 1.61”
Main crystal size: 1.8 × 1 cm = 0.71” × 0.39”