iridescent Goethite from Tharsis (Andalousia)
PUMI1879
Goethite is an iron bearing hydroxide mineral. Goethite often forms from through the weathering of other iron-rich minerals. but in this spanish open mine near the city of Tharsis, in Andalousia, this mineral did not only agglomerate in the shape of "fingers", but also with this great iridescent color. Finaly, it could match any other color!
