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. Selenite is believed to be a powerful protection stone, creating a soft peaceful environment and unblocking mental clarity.
 
Each is unique and may appear slightly different in colour, shape and size from the example photographed. Size and Weight are averaged.