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Cleavelandite Albite & Muscovite

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RBR191595

Cleavelandite Albite & Muscovite

Description Tabs

Description
Locality: 
Golconda Pegmatite, Governador Valadares, Minas Gerais, Brazil
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 6.5 × 3 cm
Description

I haven't seen such kind of specimen before. There's a large plate of skin-colored albite with a beautiful cluster of clevelandite on top. This cabinet-sized specimen might not look spectacular on the 1st view. But it's 99% undamaged and shows hundreds of fine crystallized clevelandite as a half-sphere on matrix. The crystals have a good luster and are associated with some light green muscovite-crystals. The albite's front is also perfect crystallized! Unusual stuff.

Mineral Data
What's on the rock

Cleavelandite

Variety Of: 

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Hardness: 
0.0

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden

Muscovite

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

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