This wonderful selenite crystal - carved out to make a lamp - was part of my birthday present from Jo last month.
Selenite, satin spar, desert rose, and gypsum flower are four varieties of gypsum which 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 sulphate dihydrate, with the chemical formula CaSO4·2H2O.
All varieties of gypsum are very soft minerals (hardness: 2 on Mohs Scale). This is the most important identifying characteristic of gypsum, as any variety of gypsum can be easily scratched with a fingernail. Because gypsum has natural insulating properties it feels warm to the touch.
Thanks for stopping by! Would you like a cup of tea or coffee? And please, sit for a spell. If you enjoy my posts, please feel free to follow me or subscribe to my blog. This is a word verification free, family friendly blog, so everything I share here is for all ages. I am a happily married man in my late sixties who lives on the Wirral peninsula, near Liverpool, in the UK.
I'm a blogger - and nowadays that seems to be my main occupation. Rambles from My Chair is my main blog. I’m a retired local government executive - now studying how to survive a neurological disorder that gives me various problems but, hopefully, a whole new outlook on life and an increased sense of humour and perspective. There is a saying in Sweden "man måste vara frisk för att orka vara sjuk" ~ "you have to be well to cope with being ill"....
I enjoy most forms of communication and postcards are a special favourite. I used to blog as Scriptor Senex which is Latin for Old Writer but now Google only lets me post as John Edwards.
“He’s not so old. He’s just the age that he is, that’s all.” (Gerald Hammond)