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Humboldtine & Muscovite

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Humboldtine & Muscovite

Description Tabs

Description
Locality: 
Coronel Murta, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 4.5 × 3.1 cm
Description

A cluster of muscovite crystals hosts dozen canary yellow humboldtine crystals

Mineral Data
What's on the rock

Humboldtine

Formula: 
Fe2+(C2O4)·2H2O
Strunz: 
10.AB.05
Crystal System: 
Orthorhombic
Hardness: 
1.5 - 2.0
Type Locality: 
Korozluky (Kolosoruk), Most, Ústí Region, Bohemia (Böhmen; Boehmen), Czech Republic

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White