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Chalcopyrite & Quartz

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BMM877421

Chalcopyrite & Quartz

Description Tabs

Description
Locality: 
Borieva Mine, Madan, Smolyan Oblast, Bulgaria
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 2.8 × 1.8 cm
Description

Chalcopyrite with fantastic tarnishing colors mainly in the shades of blue, violet, red and golden. The chalcopyrite sit individually on matrix -The main crystal is particularly striking - and are accompanied by small quartz crystals and some black sphalerite. The back is covered with black shiny sphalerite. The piece comes from a small find in summer 2021. Well crystallized all around - only the bottom was grown on the rock.

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