Description
Shiny, very red, automorphic piedmontite crystals in a white talc gangue.
Piedmontite is a pink to purplish silicate of calcium, manganese, aluminum and iron.
A specimen from the former Prabornaz mines in Italy’s Aosta Valley.
A specimen from the collections of the former Petit Séminaire d’Isère.
An old label is stuck on the specimen, but difficult to decipher.
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