Pyrobelonite, Copper
Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden
Pyrobelonite (highest reflection)in its most common occurrence as fissure fillings, in this sample together with native copper. The pyrobelonite could easily be mistaken for cuprite, but pyrobelonite shows anisotropic behavior. Polished section, reflected light, open nicols, size 0.5 mm. Collection and photo Kjell Gatedal.
© Kjell Gatedal Filipstad Sweden