Huge size parallel growth of tabular crystals of barite, very sharp and with very well defined faces and edges. They are translucent and very bright and have flattened crystals of marcasite showing the twin known as "cockscomb".
These mines are located approximately 50 km south of Alnif, near the border with Algeria. This area was already mined in medieval age for the extraction of copper. In the 60s of the last century, French companies expanded shafts and mineral extraction.