These rare specimens of hedenbergite-actinolite correspond to those cited by L. Tomàs (Els Minerals de Catalunya, year 1920) and E. Bareche (Els Minerals de Catalunya, Segle XX, year 2005: "Where it really appears in large quantities is inside the well they made near the creek in the mines of Can Serrat, road from Hostalric to Arbúcies, in the district of Sant Feliu de Buixalleu. It is shiny, greenish in color; we collected and kept specimens that were examined by Don Ramón Adan de Yarza, which confirmed our identification". It is a skarn formed by the contact of the granodiorites and the limestone of the Paleozoic. From the former Arguijo collection.

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