Tectosilicate (framework silicate), zeolite group
Specific gravity: 2.10 to 2.15
Hardness: 4 to 5
Colour: Colourless, white, yellow, pink, orange, red
Common impurities: Mg
Mordenite occurs in silica rich (eg rhyolitic) volcanics, in volcanic ash beds,
tuff, and rarely in
olivine - basalt. It is
of hydrothermal or sedimentary authigenic (formed in place) origin
Associated minerals include zeolites, calcite, kaolinite and glauconite (HOM).
The type locality is at Morden, Kings county, Nova Scotia, Canada.
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