Barite

Barite

Barite

Barite Minerals, Crystals from Morroco . 

Barite or Baryte is a mineral consisting of barium sulfate. Baryte is generally white or colorless, and is the main source of barium. Some deposits are orange, yellow and rarely blue.  Typically found as thick to thin tabular crystals, usually in clusters with the crystals growing parallel to one another, or nearly so. Also as bladed, white masses

The baryte group,  consists of baryte, celestine, anglesite, and anhydrite.