Kernite

borate

colemanite

Formula: Na2B4O6<(OH)2.3H2O borate
Specific gravity: 1.9
Hardness: 2½ to 3
Streak: White
Colour: When fresh colourless and transparent, but usually white and opaque
Solubility: Slightly soluble in water; readily soluble in hydrochloric, sulphuric and nitric acid
Environments:

Sedimentary environments

Kernite occurs in chemical sedimentary environments associated with colemanite and ulexite. The kernite is believed to have formed from borax.
It alters to tincalconite on dehydration.

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