2.6: Properties Under Plane Polarized Light

Cate Larsen on Instagram: "Fun fact: you can sift through NASA’s digital catalogue of lunar samples and read whole reports on their chemistry and setting?? Amazing! Also yes there are other kinds of moonstone that exist on different parts of the diagram, like regular moonstone that’s actually a *potassium* feldspar and not plagioclase at all! - #mineral #minerals #crystal #crystals #moonrock"