Gypsum, selenite var.

Gypsum, selenite var.

Gypsum, CaSO4 . 2H2O is an evaporite mineral. This selenite variety specimen is composed of numerous sprays of small tabular crystals, varying in colour from clear to light green. The location is from the Pernatty lagoon, near to Mount Gunson copper mine in South  Australia. The green colour is attributed to copper from the nearby mine.