JFD36AN7: I had seen many pieces from this locality, but never found one that completely satisfied me. In 2013, Ester Pulido from 'Tesoros Naturales' had this piece and, given how 'fresh' the Fe-bearing Dolomite looked, and the beautiful edging of the white Calcite, I really liked it and bought it from her. In fact I still think that it is very beautiful for what is usually seen in this locality.
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”