Mineral: Calcite on dolomite
Locality: La Florida mining area, Herrería-Valdáliga-Rionansa, Comarca Costa Occidental/Saja-Nansa, Cantabria, Spain
Dimensions: Crystal size: 4.5 cm

Description: Complex calcite single crystal composed by a combination of faces belonging to flat rhombohedron {012} (Miller indices in white), scalenohedron {211} (black), prism {100},{001} (yellow) and rhombohedron {101} (orange) perched on a dolomite aggregate. Scalenohedral faces (black) are somewhat distorted due to rhombohedral modifications, creating striation. Indices assuming c-axis positive in this side. Photo: Joaquim Callén

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