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Halotrichite With Cuprian Melanterite

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CLB134489

Halotrichite With Cuprian Melanterite

Rare Mineral

Description Tabs

Description
Locality: 
Aljustrel Mines, Aljustrel, Beja District, Portugal
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 5.5 × 3.1 cm
Description

This was labeled as 'fibroferrite" - but this is not listed at the locality. Halotrichite seems to be the logical choice for the fibrous mineral. The green material is cuprian melanite.

Mineral Data
What's on the rock

Halotrichite

Formula: 
FeAl2(SO4)4·22H2O
Strunz: 
7.CB.85
Hardness: 
1.5 - 2.0
Streak: 
White

Cuprian Melanterite

Variety Of: 

Melanterite

Formula: 
FeSO4·7H2O
Strunz: 
7.CB.35
Hardness: 
2.0
Formula: 
(Fe,Cu)SO4·7H2O
Hardness: 
0.0

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