Dolomite (variety Fe-bearing dolomite) with Calcite

Iron mines of Ojos Negros, Ojos Negros, Comarca Jiloca, Teruel, Aragon  Spain

Specimen size: 11.6 × 9.4 × 5 cm = 4.57” × 3.70” × 1.97”
Main crystal size: 2.7 × 2.2 cm = 1.06” × 0.87”