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Formula: [Pb8Zn3Cu2+(OH)16](SO4)2(S2O3)2.2H2O
Hydrated sulphate/thiosulphate
Crystal system: Monoclinic
Environments
Blueridgeite is a new mineral, approved in 2024 and presently (July 2025) pending publication.
Localities
The type locality is the Redmond Mine, Waterville Lake, Haywood County, North Carolina, USA. Here blue
polycrystalline spheres of blueridgeite have been found with some colourless blades of
siligiite. Despite the preponderance of both sulphate
(S6+O4)2- and thiosulphate
(S6+O3S2-)2- minerals at the Redmond Mine, and of substitution of
sulphate for thiosulphate and vice versa, blueridgeite is the only mineral at the mine to incorporate both as
essential structural components ordered into distinct sites. Its structure is otherwise quite similar to that of
cherokeeite and
cuprocherokeeite
(Mindat photo - Chris Emproto).
Blueridgeite from the Redmond Mine -
Image
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