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Kidwellite On Rockbridgeite

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PJM82992

Kidwellite On Rockbridgeite

Ex J & S Mommers Collection

Description Tabs

Description
Locality: 
Coon Creek Mine, Shady, Polk County, Arkansas, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 3 × 2.6 cm
Description

A mass of light olive green spheres of kidwellite crystals albeit completely covers the black rockbridgeite that lines this cavity

Mineral Data
What's on the rock

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

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
Earthstones Australia

Seller Information

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