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Fluornatromicrolite Topaz & Albite

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POL886550

Fluornatromicrolite Topaz & Albite

Analysed

Description Tabs

Description
Locality: 
Skardu, Gilgit-Baltistan, Pakistan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.8 × 4 × 2.3 cm
Description

Very nice and interesting specimen of honey-yellow to dark Fluornatromicrolite crystals with several, very nice formed crystals of colorless Topaz (Germanium (Ge) rich!!!) on white Albite matrix with one pink Microcline crystal. Topaz crystals also contain few, different inclusions - Fluornatromicrolite crystals, negative crystal and some black, unidentified phase. Analysed!

Specimen on acrylic base (could be remove).

Additional photos of inclusions in "label" section.

Mineral Data
What's on the rock

Fluornatromicrolite

Formula: 
(Na,Ca,Bi)2Ta2O6F
Strunz: 
4.DH.15
Crystal System: 
Isometric
Hardness: 
5.0 - 0.0
Colour: 
Green
Streak: 
White
Type Locality: 
Quixaba pegmatite, Quixaba, Frei Martinho, Borborema mineral province, Paraíba, Brazil

Topaz

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

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden
Labels
Label Images - only: Fluornatromicrolite Topaz & Albite
Label Images - only: Fluornatromicrolite Topaz & Albite
Label Images - only: Fluornatromicrolite Topaz & Albite

Seller Information

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