Erythrite, Quartz, Roselite

Specimen ID: CEC-H3A

Mineral(s)
Erythrite : Co3(AsO4)2·8H2O
Quartz : SiO2
Roselite : Ca2Co(AsO4)2·2H2O
Locality
Mindat locality:
Events

Photo added to mindat.org

A squareish block of dark grey matrix has an internal vug and one face covered in needle quartz to around 4mm tall. In both these areas there are small but perfect & transparent erythrite crystals to 5mm max, and some bright pink balls of Roselite - 1.5mm max (not in the vug.)Very photogenic and lovely to study under a loupe.
Mark Wrigley (2) - 30th November 2000
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