Formula: Ni(OH)2
Hydroxide, brucite group
Specific gravity: 4.00
Hardness: 3½
Streak: Light green
Colour: Emerald green
Environments
Theophrastite occurs as coatings in chromitite in lenses in
serpentinite
(Webmin).
Localities
At the type locality, Vermion mountain, Pella, Central Macedonia, Greece, theophrastite occurs in a
magnetite-chromite mine with
magnetite, chromite,
millerite, vesuvianite,
chlorite,
andradite-grossular,
nickel-bearing serpentine minerals and
calcite
(AM 66.1020-1021, Dana, HOM).
At the Hagdale quarry, Scotland, UK, theophrastite occurs on chromitite associated
with zaratite, reevesite,
honessite and hydrohonessite
(HOM)
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