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Jahnsite-(CaMnFe) & Frondelite

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SER512172

Jahnsite-(CaMnFe) & Frondelite

Rare Mineral

Description Tabs

Description
Locality: 
Sapucaia Mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 1.8 × 1.8 cm
Description

A very rich specimen featuring several lustrous, orange-brown jahnsite crystals on matrix with brown frondelite; self collected on 2010

Mineral Data
What's on the rock

Jahnsite-(CaMnFe)

Formula: 
{Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2·8H2O
Strunz: 
8.DH.15
Hardness: 
4.0
Streak: 
White
Type Locality: 
Fletcher Mine, Groton, Grafton Co., New Hampshire, USA

Frondelite

Formula: 
Mn2+Fe3+4(PO4)3(OH)5
Strunz: 
8.BC.10
Hardness: 
4.5
Type Locality: 
Sapucaia Mine (Proberil mine), Sapucaia do Norte, Galiléia, Doce valley, Minas Gerais, Brazil