RR16I7: Parallel growth of rhombohedral crystals. They have a considerable size for the locality and present good color and luster, even considering the long time passed since the specimen was mined.
This specimen's photo has been reviewed and published in the magazine ‘Mineralogical Record’ on page 45 in the volume 50, number 1, January-February 2019, ('Almadén!')
San Teodoro shaft, Almadén Mine, Almadén, Comarca Valle de Alcudia, Ciudad Real, Castilla-La Mancha  Spain (±1979)

Specimen size: 2 × 1.4 × 1.1 cm = 0.79” × 0.55” × 0.43”