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Chalcopyrite & Quartz

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RFJ1077686

Chalcopyrite & Quartz

Classic Locality

Description Tabs

Description
Locality: 
Ashio Mine, Ashio-machi, Nikko City, Tochigi Prefecture, Honshu Island, Japan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 5.7 × 2.7 cm
Description

Specimen from the Ashio mine, the most famous Japanese Copper Mine are a real Japanese classic.                                                                       Lots of small Chalcopyrite crystals between Quartz crystals, there is one 1cm Chalcopyrite crystal which has - Moonshine - luster, for which Ashio mine was famous, the black looking Chalcopyrite turns blue if hold in the right angle against light.

 

Mineral Data
What's on the rock

Chalcopyrite

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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