"ulexite." YourDictionary, n.d. Web. 07 December 2018. <https://www.yourdictionary.com/ulexite>.
ulexite. (n.d.). Retrieved December 07th, 2018, from https://www.yourdictionary.com/ulexite
A white triclinic mineral that forms rounded, reniform (kidney-shaped) masses of very fine needle-shaped crystals. Ulexite has the unusual optical property of projecting an image of an object placed against a transverse section of it to the opposite surface. It is usually associated with borax deposits and is found in arid environments. Chemical formula: NaCaB5O9·8H2O.