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Ullmannite with Bottinoite & Annabergite

#RW47045

Ullmannite with Bottinoite & Annabergite

#RW47045
Availability
Sold
Size
4 x 3 x 2.5 cm - Miniature 
Formula
NiSbS (RRUFF)
Locality
Ramsbeck, Sauerland, North Rhine-Westphalia, Germany
Tagged
sulfide , nickel

An excellent specimen for three relatively uncommon nickel minerals. Ullmannite is a primary nickel-antimony-sulfide. Associated are two alterations of the Ullmannite: Bottinoite (aqua translucent platy crystals to about 1mm) and Annabergite (green spheroidal crystals).

Ullmannite

Formula
NiSbS 
Crystal System
Isometric 
Crystal Habit
Massive - Granular, Massive 
Cleavage
Good, Good, Good 
Luster
Metallic 
Color
steel gray, silver white, tin white 
Streak
grayish black 
Class
Isometric - Tetartoidal 
Fracture
Brittle 
Hardness
5.5 

Data courtesy of Webmineral.

Collection
Robert J. Waidler Collection

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