Mineral description : Glaucodot

Two intergrown glaucodote crystals from Håkansboda.
Hard to see since it reflects all light.
Another view of the same glaucodote crystal from Håkansboda.
Crystal size about 6 mm.

Mineral class Sulphides : Arsenopyrite löllingite group
Chemical formula (Co,Fe)AsS
Crystal system Orthorombic
Habitus Orthorombic crystals with rectangular dipyramidal octaedric form.
Cleavage [010] perfect, [101] distinct.
Hardness 5
Density 5.9 - 6.01
Color Gray to silver white, opaque.
Streak Black.
Luster Metallic.
Description  
Occurance  
Associates  
Notes Type locality : Huasco, Valparaiso, Chile.
Localities A rare mineral with a good locality in Sweden
  • Håkansboda, Västmanland. As up to 7 cm crystals in chalcopyrite, pyrrhotite or pyrite.

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axelsson@acc.umu.se
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Last changed : 2001-01-24