- Polished Selenite Ovals
- Specimens Measure approx. 2 1/2″ – 2 3/4″
- You will receive ONE specimen picked at random from your supply.
Selenite, satin spar, desert rose, and gypsum flower are four varieties of the mineral gypsum; all four varieties show obvious crystalline structure. The four “crystalline” varieties of gypsum are sometimes grouped together and called selenite.
All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO4·2H2O. Selenite contains no significant selenium; the similarity of names comes from both substances being named from the Ancient Greek word for the Moon.
Some of the largest crystals ever found are selenite crystals – the largest specimen found in the Naica Mine’s Cave of the Crystals is 12 metres long and weighs 55 tons.