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Chalcopyrite With Quartz & Galena

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BMM1029394

Chalcopyrite With Quartz & Galena

Description Tabs

Description
Locality: 
Borieva Mine, Madan, Smolyan Oblast, Bulgaria
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 3.2 × 3.2 cm
Description

Chalcopyrite with fantastic tarnishing colors mainly in the shades of blue, violet, red and golden. The chalcopyrites sit individually on matrix and are accompanied by small quartz crystals. Between small, highly lustrous metallic galena crystals have grown. The piece comes from a small find in summer 2021. Well crystallized as undamaged floater specimen.

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

Galena

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