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Roscherite & Muscovite

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SER167692

Roscherite & Muscovite

Description Tabs

Description
Locality: 
Jenipapo District, Itinga, Minas Gerais, Brazil
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 3.7 × 4.5 cm
Description

Numerous brown balls of roscherite on muscovite

Mineral Data
What's on the rock

Roscherite

Formula: 
Ca2Mn2+5Be4(PO4)6(OH)4·6H2O
Strunz: 
8.DA.10
Crystal System: 
Monoclinic Tabular crystals or platy aggregates
Hardness: 
4.5 - 0.0
Streak: 
White
Type Locality: 
Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany

Muscovite

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