From the Greek orthos, straight, right and rhombuses, spinning top, swirl, Rhombus. He says straight Prism geometry and with diamond base. In crystallography is one of the seven systems of crystallization in which the Crystal network unit cell has a way with three right angles and three edges with different lengths. Thus it crystallizes Topaz or perovskite, and some compounds hybrids as the perovskina of Galician researchers from the University of La Coruña.
