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Riebeckite Var Crocidolite

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PDM803682

Riebeckite Var Crocidolite

Description Tabs

Description
Locality: 
Koegas Mine, Prieska, Pixley ka Seme, Northern Cape Province, South Africa
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 7 × 3.1 cm
Description

Thick aggregate of parallelly grown curved fibrous crystals of blue riebeckite, variety crocidolite, from the Koegas mine.

Acquired in 1982. Ex Jan Sibtsen #4478.

Mineral Data
What's on the rock

Riebeckite

Formula: 
◻[Na2][Fe2+3Fe3+2]Si8O22(
Strunz: 
9.DE.25
Hardness: 
5.0 - 5.5
Type Locality: 
Socotra Island, Adan Governorate, Yemen

Crocidolite

Variety Of: 

Riebeckite Root Name

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

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