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Galena Sphalerite Chalcopyrite

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RFJ1077688

Galena Sphalerite Chalcopyrite

Classic Locality

Description Tabs

Description
Locality: 
Tohya Mine, Takarada, Shiribeshi Subprefecture, Hokkaido Island, Japan
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.1 × 4.1 × 2 cm
Description

This is Kuroko ore (black ore) which was a very important source of base metals in Japan - for a long time.                                                                    Kuroko origine is the same as the black smokers on the ocean floors these days, through tectonics these deposits got up lifted and are now in Japan on land and are mostly not metamorphosed - which  is rare for such deposits Worldwide seen.

 

Mineral Data
What's on the rock

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0

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