ulexite

A white mineral, NaCaB₅O₉·8H₂O, that forms rounded masses of very fine needle-shaped crystals.

A hydrous borate of calcium and sodium, occurring in loose rounded masses with fibrous structure and white color. Also called boronatrocalcite, natroborocalcite.

A mineral occurring in white rounded crystalline masses. It is a hydrous borate of lime and soda.

A white mineral with triclinic crystals, NaCaB5O9·8H2O.