Gypsum is a mineral found in crystal as well as masses called gypsum rock.  It is a very soft mineral and it can form very pretty, and sometimes extremely large colored crystals.  Massive gypsum rock forms within layers of sedimentary rock, typically found in thick beds or layers.  It forms in lagoons where ocean waters high in calcium and sulfate content can slowly evaporate and be regularly replenished with new sources of water.  The result is the accumulation of large beds of sedimentary gypsum.

Please note that this specimen is extremely fragile and we would expect a small amount of fragmentation during transit. It will be packed with care.