Plombièrite

plombierite

bredigite

larnite

vesuvianite

Images

Formula: Ca4Si6O16(OH)2(H2O)2.(Ca.5H2O)
Phyllosilicate (sheet silicate), tobermorite group
Specific gravity: 2.018
Hardness:
Streak: White
Colour: White to pink to red-brown
Environments

Metamorphic environments
Hydrothermal environments

Plombièrite occurs in skarns and as deposits from thermal waters (Dana).

Localities

At the type locality, Plombières-les-Bains Thermal Springs, Plombières-les-Bains, Épinal, Vosges, Grand Est, France, plombièrite occurs as a gelatinous substance which hardens in air, formed from thermal waters and associated with zeolites (HOM).

At Ballycraigy, Larne, County Antrim, Northern Ireland, UK, plombièrite occurs as a natural gel formed from hydration of bredigite and larnite at a dolerite-chalk contact (HOM).

At the Crestmore quarries, Crestmore, Riverside county, California, USA, plombièrite occurs in vesuvianite (Webmin).

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