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Crocidolite & Chalcedony

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PDM797794

Crocidolite & Chalcedony

Description Tabs

Description
Locality: 
Tenke Deposit, Tenke-Fungurume, Kolwezi, Lualaba, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.6 × 3.7 × 2.1 cm
Description

This is a very rare locality specimen of crocidolite from Tenke. It is of dark blue colour, with areas or altered or loose fibrous crystals of a lighter colour. In addition the matrix is a reddish chalcedony mass witch is a very uncommon association in Congo.

Old specimen, perfectly located because it was collected before 1968 by Martíal Borzee (with a handwritten label), a Belgian engineer in Congo.

Mineral Data
What's on the rock

Crocidolite

Variety Of: 

Riebeckite Root Name

Formula: 
◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
Hardness: 
0.0
Hardness: 
0.0

Chalcedony

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey

Seller Information

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