This is a beautiful specimen of beautiful, blue bladed barite crystals. A small deposit from the iron based matrix can still be seen along the edges of some crystals. These barite crystals were mined at Sidi Lahcen, Nador, Morocco from pockets in brecciated rock.
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.