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Derbylite

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JYJ687424

Derbylite

SEM-EDS confirmed specimen! derbylite/graeserite

Description Tabs

Description
Locality: 
Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 2.3 × 1.6 cm
Description

Striated derbylite/graeserite crystals on carbonatic matrix. Very good sample which was not chemically treated by acid. 

Analysis attached, sample has the analysis number 2018-11-27-22

Mineral Data
What's on the rock

Derbylite

Formula: 
Fe3+4Ti3Sb3+O13(OH)
Strunz: 
4.JB.55
Crystal System: 
Monoclinic
Hardness: 
5.0
Streak: 
Brown
Type Locality: 
Tripuí (Tripuhy), Main district, Ouro Preto, Iron Quadrangle, Minas Gerais, Brazil