Found in anoxic laminated sediments rich in organic matter. Dimorphic relationship with alabandite.
IMA Status:
Approved IMA 1995 (Dana # Added)
Locality:
Gotland Deep, Baltic Sea, off the coast of Sweden. Also found in a skarn in the Garpenberg area, Dalarna, Sweden. Link to MinDat.org Location Data.
Name Origin:
Named after Hans Ramberg (1917-1998), Professor of Mineralogy and Petrology at the University of Chicago, then at the University of Uppsala, Sweden.