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Mineralpedia Details for Rambergite

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Rambergite

Rambergite

Named for Hans Ramberg, a Professor of Mineralogy at the University of Chicago in Illinois, USA, and then at the University of Uppsala in Sweden. Appears as brown to red thick, hexagonal tablets or as hexagonal pyramids. Found in an amphibole skarn at the type locality in the Garpenberg Norra mine in Dalarna, Sweden. It can also be found in a uranium ore deposit where it occurs as a late mineral along with gypsum, ettringite, bazhenovite, and hannebachite in the Lichtenberg Absetzer mine in the Ronnaberg U deposit in Thuringia, Germany. Additional, newer localities can be found in Japan at the Hirogawara mine on Honshu Island, in China in the Luobusha ophiolite in the Shannan prefecture, and at Gotland Deep in the Baltic Sea.

Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)

IMA/CNMNC List of Mineral Names (2009) and Geologiska Foreninges I Stockholm Forhandlingar 118 (1996), A53

Formula
MnS 
Crystal System
Hexagonal 
Crystal Habit
Hexagonal, Prismatic 
Cleavage
Distinct, Distinct, None 
Luster
Resinous 
Color
brown, black 
Streak
brown 
Class
Hexagonal - Dihexagonal Pyramidal 
Fracture
Brittle - Uneven 
Hardness
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Rambergite from Hirogawara mine, Chichibu City, Saitama Prefecture, Kanto Region, Honshu Island, Japan

Rambergite
            from Hirogawara mine, Chichibu City,  Saitama Prefecture,  Kanto Region, Honshu Island, Japan

Orange coatings on matrix.

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