SV120RCX: Very sharp bisphenoidal crystals of Chalcopyrite with a pseudotetrahedral habit, twinned and with the good color and luster characteristic of the species. They appear with Dolomite crystals embedded in a matrix of Calcite. This type of specimen was unknown at the locality until this find.
Salomón Cut, bench 290, Rio Tinto Mines, Minas de Riotinto, Comarca Cuenca Minera, Huelva, Andalusia  Spain

Specimen size: 8.9 × 5 × 4.7 cm = 3.50” × 1.97” × 1.85”

Main crystal size: 0.5 × 0.4 cm = 0.20” × 0.16”