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

Example:
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Taxonomy
Ulexite, free encyclopedia, hydroxide, mineral, from California, sodium, TV rock, parallel fibers, chains, slow ray, calcium borate, boron, borate, mineral borax, internal reflection, rays, cones, search.

Defination from the web:
Ulexite (Na Ca B 5O 9·8H2O) (hydrated sodium calcium borate hydroxide) is a mineral occurring in silky white rounded crystalline masses or in parallel fibers. ... Ulexite is found with the mineral borax and is directly deposited in arid regions from the ... Ulexite from California ...