MICHAEL BARNETT / SCIENCE PHOTO LIBRARY MICHAEL BARNETT / SCIENCE PHOTO LIBRARY
A sample of the mineral celestite (strontium sulphate), also known as celestine. A common mineral forming prismatic or more rarely tabular crystals, which are colourless, milky white, pale blue or yellow. It is often found disseminated in carbonate-rich rocks or evaporite deposits, associated with minerals such as gypsum, aragonite & sulphur, and chlorides. Celestite is the main ore for strontium and its salts, and is used in making fireworks and flares (giving a crimson flame). It is also used in the nuclear industry, paint and electrical batteries, in the refining of beet sugar, and in the preparation of iridescent glass and porcelain.
Model release not required. Property release not required.