TBC57AP5: Group of trapezohedral Chalcopyrite crystals, very sharp, lustrous and with intense metallic iridescence with dominant green and blue tones, with small coatings of Quartz.
The specimen, a German classic, comes from the Robert-Auguste Touchon collection.
Friedrich-Wilhelm Mine, Biersdorf, Daaden, Daaden-Herdorf, Altenkirchen District, Rhineland-Palatinate/Rheinland-Pfalz  Germany

Specimen size: 6.1 × 4.4 × 3.2 cm = 2.40” × 1.73” × 1.26”

Main crystal size: 1.2 × 1 cm = 0.47” × 0.39”