Bournonite
La Pereire, Laffrey, Grenoble, Isère, Auvergne-Rhône-Alpes, France
Exceptional and very old specimen of bournonite, partially transformed to copper carbonates.
Although bournonite crystals from Laffrey were alreday described by A. Lacroix in the collections of the Natural History Museum, specimens became scarce and it is now very difficult to find them in private collections.
Size: 60 x 40 mm (25 mm for the ...
© Alain TUEL