Stichtite

stichtite

pyroaurite

iowaite

woodallite

Images

Formula: Mg₆C₂(CO₃)(OH)₁₆.4H₂O
Hydrated carbonate containing hydroxyl, hydrotalcite group, hydrotalcite supergroup
Crystal System: Trigonal
Specific gravity: 2.16 measured, 2.11 calculated
Hardness: 1½ to 2
Streak: White to light lilac
Colour: Rose-pink to purple
Common impurities: Fe
Environments

Metamorphic environments

Localities

At the type locality, Stichtite Hill, Dundas mineral field, Zeehan District, West Coast municipality, Tasmania, Australia, stichtite occurs as irregularly-shaped masses, veins and blebs in serpentine found in serpentinites and associated with chromite (Mindat).

At Terekta Ridge, Ust-Koksinsky District, Altai Republic, Russia, hydrotalcite supergroup minerals stichtite, pyroaurite, iowaite and woodallite form a complex solid-solution system (Russian Geology and Geophysics 61.1.36–46).

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