This Specimen has been sold.
7.7" Ram's Horn Selenite on Matrix - Morocco
This is a natural gypsum var. selenite (ram's horn) formation that was collected from the Bou Azer East Deposit of Morocco. The selenite formed by expanding from the dolomite matrix. The underside of the specimen contains a green mineralization, most likely fibrous malachite crystals. Comes with an acrylic display stand.
Selenite is a variety of gypsum, a soft sulfate mineral that is composed of calcium sulfate dihydrate (CaSO4 · H2O). When chemically pure, gypsum is transparent and colorless, however, impurities give the gypsum a diverse range of colors and formations. Desert rose, selenite and satin spar are just a few of the varieties of gypsum known to have formed though hydrothermal processes.