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Chalcopyrite With Chrysocolla & Quartz & Gold

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LGM610357

Chalcopyrite With Chrysocolla & Quartz & Gold

Ex Dr. Krantz, Bonn, Germany
With Antique Label

Description Tabs

Description
Locality: 
Kavala, East Macedonia and Thrace, Greece
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
6.5 × 7 × 3.5 cm
Weight: 
237.00gr
Description

An interesting old sample of gold ore: So-called "copper pitch ore" with chrysocolla and gold-bearing quartz from an uncommon greek locality.

Comes with very beautiful old Dr. Krantz pen&ink label. The label means: "Kupferpecherz mit Chrysokolla und goldführendem Quarz - Kawalla Griechenland" (Copper pitch ore with chrysocolla and gold-bearing quartz - Kavala, Greece).
"Kupferpecherz" is an old designation for blackish, inhomogeneous masses of cuprite + tenorite, occasionally pseudomorphs after chalcopyrite. The deposits have already been mined for gold in ancient times.
Allthough I was not able to identify free gold (pics 5 and 6 show likely sulphides), it is a rare and very special historic specimen.

Mineral Data
What's on the rock

Chalcopyrite

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

Chrysocolla

Formula: 
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x < 1)
Strunz: 
9.ED.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.5

Quartz

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

Gold

Formula: 
Au
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0

Seller Information

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