Calcite
Recsk Mine, Recsk, Pétervására District, Heves County, Hungary
Two generations of calcite cover a matrix of calcite, chalcopyrite and andasite? The first generation consists of small groups of tiny, grey, flat crystals topped with a second generation of waxy prismatic crystals to 14mm, as single crystals and groups of radiating crystals.
© P. Nicholson