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Tantalite-(Mn)

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PDM686238

Tantalite-(Mn)

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Description
Locality: 
Mumba Cassiterite Gravels, Mumba, Masisi Mountains, North Kivu, DR Congo
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 3.2 × 2.4 cm
Description

Very rare, heavy thick crystal of tantalite-Mn with slightly rounded edges and corners due to some transport and erosion. These specimens were historically recovered from old fluvial terraces at the Mumba area, worked for cassiterite. I have only seen a handful of these, and few of this quality, where the orthorhombic morphology is recognized.

It is a floater piece, from the collection of Achiel Moors, a Belgian mineral collector who lived in Congo between 1957 and 1972.

Mineral Data
What's on the rock

Tantalite-(Mn)

Formula: 
MnTa2O6
Strunz: 
4.DB.35
Hardness: 
6.0
Type Locality: 
Utö Mines, Utö, Södermanland, Sweden

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