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Stannomicrolite & Rubellite

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SER897246

Stannomicrolite & Rubellite

ex Americo Urbinati collection

Description Tabs

Description
Locality: 
Varuträsk, Skellefteå, Västerbotten County, Sweden
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 4.1 × 3.2 cm
Description

some brown crystals of stannomicrolite on matrix with elongated pink rubellite

Mineral Data
What's on the rock

Stannomicrolite

Variety Of: 

Stannomicrolite (of Hogarth 1977)

Formula: 
(Sn,Fe,Mn)2(Ta,Nb,Sn)2(O,OH)7
Strunz: 
4.DH.15
Hardness: 
4.5 - 5.5

Rubellite

Variety Of: 

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Hardness: 
7
Hardness: 
0.0