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Columbite-(Mn) & Montebrasite & Topaz & Lepidolite

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SKY1106588

Columbite-(Mn) & Montebrasite & Topaz & Lepidolite

Rare Mineral

Description Tabs

Description
Locality: 
Viitaniemi Pegmatite, Eräjärvi, Orivesi, Pirkanmaa, Finland
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4 × 3.5 cm
Description

Black columbite-(Mn) associated to montebrasite, topaz and lepidolite from the famous Viitanuemi in Finland

Ex.A.L.Kidwell collection (1978) with label included (see photo)

Ex. Dr.Buford Nichols collection

Ex. Dakota Matrix specimen  with label included (see photo)

Ex. Erich Laskowski collection (USA) .

Mineral Data
What's on the rock

Columbite-(Mn)

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

Montebrasite

Formula: 
LiAl(PO4)(OH)
Strunz: 
8.BB.05
Hardness: 
5.5 - 6.0
Streak: 
White
Type Locality: 
Montebras Mines, Montebras, Soumans, Creuse, Limousin, France

Topaz

Formula: 
Al2(SiO4)(F,OH)2
Strunz: 
9.AF.35
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
8.0
Streak: 
White

Lepidolite

Synonym Of: 

Mica Group

Formula: 
KLi2Al(Si4O10)(F,OH)2 to K(Li1.5Al1.5)(AlSi3O10)(F,OH)2
Group Parent: 
Mica
Hardness: 
2.5 - 3.5
Colour: 
Pink, light purple, light rose red
Streak: 
White

Current price

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30
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Start 14 Mar 18:00
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Spain
9
Europe
14
Rest of the World
18

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