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Columbite-(Mn)

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SER1140487

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Description
Locality: 
Gonçalves Mine, Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 5.1 × 3.6 cm
Largest Crystal: 
1.10cm
Description

a group of black columbite-Mn crystals on albite matrix ; purchased in Taquaral, Minas Gerais, Brazil, on 2023

Mineral Data
What's on the rock

Columbite-(Mn)

Formula: 
(Mn,Fe)(Nb,Ta)2O6
Strunz: 
4.DB.35
Hardness: 
6.0

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60
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Start 25 Nov 18:00
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