The situation now is that I don't currently have any shoes that I'd feel good walking around all day long in...not the way we like to walk. I have good running shoes, but I really don't feel like wearing those on a trip to Europe. This is asking way early - but if it takes me a few tries to find the right shoes, I'd rather get that sorted out sooner, rather than later.
Selenite is a variety of the mineral gypsum, which has a chemical formula of calcium sulfate dihydrate.The dihydrate part of that formula indicates that each unit has two molecules of water attached to it.elenite is a variety of the mineral gypsum, which has a chemical formula of calcium sulfate dihydrate.
Selenite cluster from Naica mine, Chihuahua, Mexico. 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.ypsum crystals can be transparent (most often selenite), translucent (most often satin spar but also selenite and gypsum flowers), and opaque (most often the rosettes and flowers).