Selenite is hydrous calcium sulphate. Selenite is soft and can easily be scratched with a fingernail. In some very rare instances, water becomes encased in a cavity as the crystal forms. Because of the way Selenite crystals form Selenite exhibits fibre optic qualities.
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.
Please Note: Natural gemstone or semi-precious stone comes from mineral. Due to the naturality, the stones may have a tiny flaw. Meanwhile, cutting or polishing also makes every piece of gemstone vary in colour and size. Image may look different (colour) due to many monitor or device resolutions.