4" Marcasite and Bladed Barite Crystal Association - Morocco
This is a cluster of marcasite crystals that's associated with colorless bladed barite crystals, collected from the Bou Nahas Mine (Bou N'hass Mine) in the Oumjrane area of Morocco. The crystals are all intertwined, with what could be considered the underside of the specimen displaying the most barite crystals.
Barite, commonly spelled baryte, is well-known for its great range of colors and varied crystal forms and habits. It is a heavy mineral consisting of barium sulfate, and typically has the chemical formula of BaSO4. The barite group consists of baryte, celestine, anglesite and anhydrite. It's generally white to colorless and is the main source of barium.