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Robertsite Rockbridgeite & Strunzite

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CLB127470

Robertsite Rockbridgeite & Strunzite

ex Pelkmann coll.
Rare Mineral

Description Tabs

Description
Locality: 
Hagendorf South Pegmatite, Bavaria, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1.3 × 1.3 cm
Description

Dark brown robertsite crystals alongside rockbridgeite balls plus a few strunzite needles.

Mineral Data
What's on the rock

Robertsite

Formula: 
Ca3Mn3+4(PO4)3O2·3H2O
Strunz: 
8.DH.30
Hardness: 
3.5
Streak: 
Red-brown
Type Locality: 
Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA

Rockbridgeite

Formula: 
Fe2+Fe3+4(PO4)3(OH)5
Strunz: 
8.BC.10
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.5
Type Locality: 
Midvale Mine, South Mountain, Midvale, Rockbridge Co., Virginia, USA

Strunzite

Formula: 
Mn2+Fe3+2(PO4)2(OH)2·6H2O
Strunz: 
8.DC.25
Hardness: 
4.0
Streak: 
White
Type Locality: 
Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Hagendorf, Waidhaus, Upper Palatinate, Bavaria, Germany

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