Roger Weller, geology instructor
[email protected] copyright 2010-R.Weller
tarnished chalcopyrite-1
Messina, Transvaal, S.W. Africa
Tarnish is often added to chalcopyrite by
exposing it to sulfuric acid.
chalcopyrite
100
Photo is copyright free only for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.