“Octahedral Pyrite crystal, with sharp faces and edges and slightly rounded vertices, rusty appearance, implanted in Dolomite matrix and accompanied by small Calcite crystals. Trimouns Mine, Luzenac, Ariège, Occitanie, France Specimen size: 4.5 × 3.8 × 2.7 cm = 1.77” × 1.50” × 1.06” Main crystal size: 0.8 × 0.7 cm = 0.31” × 0.28” 2V10 (from Express Minerals) ”