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Variscite Frondelite Kidwellite & Bermanite

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SER646047

Variscite Frondelite Kidwellite & Bermanite

Description Tabs

Description
Locality: 
Eduardo Claim, Conselheiro Pena, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.1 × 1.7 cm
Description

Several red variscite crystals on brown frondelite with green balls of kidwellite and red-brown bermanite

Mineral Data
What's on the rock

Variscite

Formula: 
AlPO4·2H2O
Strunz: 
8.CD.10
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.5
Streak: 
White
Type Locality: 
Meßbach Quarry, Meßbach, Plauen, Vogtland, Saxony, Germany

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

Kidwellite

Formula: 
NaFe3+9(PO4)6(OH)11·3H2O
Strunz: 
8.DK.20
Hardness: 
3.0
Streak: 
yellow
Type Locality: 
Fodderstack Mountain, Norman, Montgomery Co., Arkansas, USA

Bermanite

Formula: 
Mn2+Mn3+2(PO4)2(OH)2·4H2O
Strunz: 
8.DC.20
Crystal System: 
Monoclinic
Hardness: 
3.5
Type Locality: 
7U7 Ranch (7-U-7 Ranch), Bagdad Mine area, Hillside, Eureka District, Yavapai Co., Arizona, USA