Named in 1845 by Alexander Löwe in honor of Johann Rudolf Ritter von Gersdorff, mining expert and owner of the nickel mine at Schladming, Austria. 


Bou Azzer District, Tazenakht, Ouarzazate Province, Drâa-Tafilalet Region, Morocco

Item-No.: MIN0367
Price: 595.00 EUR 

Synonyms:  Amoibite, Disosmose, Dobschauite, Nickelarsenikkies, Stirian
Classification:  Sulfides and Sulfosalts, Cobaltit Group
Chemical formula:  NiAsS
Crystal system:  Isometric
Density (g/cm3):  5,9 measured, 5,966 calculated
Tenacity:  Brittle
Cleavage:  Perfect on {100}, {010} und {001}
Fracture:  Irregular, uneven
Hardness (Mohs):  5,5
Colour:  Gray, grayish black, silver white, or tin white
Lustre:  Metallic
Streak:  Grayish black
Fluorescence:  none
Transparency:  Opaque
Type locality:

 Zinkwand (Neualpe), Obertalbach Valley, Schladminger Tauern, Schladming, Styria, Austria