Carry a little bit of the Great Basin with you on your mobile device with these cell phone skins. As we find more over the next several months, we'll keep this collection fresh. Help yourself!
Just click on any image to download it to your computer.
A few clouds. Lows overnight in the mid 30s.
Mostly clear. Low around 35F. Winds SSE at 5 to 10 mph.
Sunny. High 77F. Winds ENE at 5 to 10 mph.
Last updated on
Sun, 28-May 6:45 pm
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, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning 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.
Formed as an evaporative mineral, gypsum is frequently found in alkaline lake muds, clay beds, evaporated seas, salt flats, salt springs, and caves. Gypsum occurs on every continent and is the most common of all the sulfate minerals.