Formula: NaCaB5O6(OH)6.5H2O borate
Specific gravity: 1.96
Hardness: 1 to 2½
Colour: Colourless, white
Solubility: Slightly soluble in water
Ulexite crystallises in arid regions from brines that have concentrated in enclosed basins, as in playa lakes.
It is usually associated with borax.
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