Description
Lot of two specimens of picropharmacolite in globular clusters of whitish acicular crystals.
It’s a mineral, a rare arsenate, with the chemical formula Ca₄Mg(AsO₃OH)₂(AsO₄)₂-11H₂O.
This specimen of picropharmacolite comes from the Gabe Gottes mine in Sainte Marie aux Mines, a mining village in the Vosges mountains in the Haut-Rhin region of Alsace.
Supplied with box and label.
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