Tectosilicate (framework silicate)
Specific gravity: 2.9 to 3.0
Hardness: 7 to 7½
Colour: Colourless, yellowish to dark brown, pink
Solubility: Insoluble in hydrochloric, sulphuric and nitric acid
Plutonic igneous environments
Danburite occurs in hypothermal (high temperature) veins, where it is associated with
orthoclase, and in
contact metamorphic rocks, where it is associated with
wollastonite and sulphides.
Danburite occurs in granite and metamorphosed carbonates and evaporites, in skarn, in marine salt deposits and in alpine crevices.
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