Chalcopyrite

Herdorf, Siegerland, Rhineland-Palatinate/Rheinland-Pfalz  Germany

Specimen size: 3.4 × 2.4 × 1.9 cm = 1.34” × 0.94” × 0.75”
Main crystal size: 2.2 × 1.7 cm = 0.87” × 0.67”