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Barnesite

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GFM1037764

Barnesite

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Description
Locality: 
Lavrion District Mines, Attiki Prefecture, Greece
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 1.6 × 1.4 cm
Description

Dark reddish brown needle crystals, inter grown to several square centimeter large crystal aggregates, very rich on Trevorite-Nosean matrix. Very good and rich specimens from a new find.

Mineral Data
What's on the rock

Barnesite

Formula: 
(Na,Ca)V6O16·3H2O
Strunz: 
4.HG.45
Crystal System: 
Monoclinic
Hardness: 
3.0
Type Locality: 
Cactus Rat Mine, Cisco, Yellow Cat District (W. part of Thompsons District), Grand Co., Utah, USA