TWIN OF SUPERIMPOSED CRYSTALS ON THEIR OWN MATRIX. GLASSES ON BOTH SIDES OF THE PIECE WITH ARROWHEAD FORMATION. WE CAN ALSO OBSERVE TRANSPARENT CRYSTALS AND OTHERS WITH A MILKIER OR ORANGE TONALITY
Gypsum is a mineral composed of calcium sulfate.
It is a sedimentary rock of chemical origin. It is very common and can form sedimentary rocks.
The gypsum crystallizes in crystals with a prismatic, tabular and rhombic shape with beveled edges. It occurs in crystals, sometimes large and arrowhead or spearhead.
