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Hulsite

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SER988855

Hulsite

ex Americo Urbinati collection

Description Tabs

Description
Locality: 
Zlatý Kopec, Boží Dar, Karlovy Vary, Karlovy Vary Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 4.5 × 2.5 cm
Description

This is a very rare iron-magnesium-tin borate hulsite and this rich specimen is from th famed old mining region of the Czech republic

Mineral Data
What's on the rock

Hulsite

Formula: 
(Fe2+,Mg)2(Fe3+,Sn)(BO3)O2
Strunz: 
6.AB.45
Hardness: 
3.0
Colour: 
Black
Type Locality: 
Brooks Mountain, Seward Peninsula, Nome Borough, Alaska, USA