Posnjakite
Posnjakite was named in 1967 after the American geochemist E. W. Posnjak (1888-1949). It forms small crystals or powder coatings of green-blue to turquoise color. It is formed as a secondary mineral on copper deposits, on heaps or abandoned mining works. It is a rare mineral
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Posnjakite was named in 1967 after the American geochemist E. W. Posnjak (1888-1949). It forms small crystals or powder coatings of green-blue to turquoise color. It is formed as a secondary mineral on copper deposits, on heaps or abandoned mining works. It is a rare mineral