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Rockbridgeite

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UVM920694

Rockbridgeite

Classic Locality

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 3.2 × 2.2 cm
Description

Sharp black crystals of rockbridgeite in phosphate matrix from the Tip Top Mine.   A label is painted on the rear of the specimen from MM Groben dated June, 1982.

Mineral Data
What's on the rock

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

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