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Tourmaline & Cleavelandite

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BMM1029462

Tourmaline & Cleavelandite

Description Tabs

Description
Locality: 
Stak Nala, Gilgit-Baltistan, Pakistan
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 3.3 × 2.6 cm
Description

This tourmaline crystal has shiny crystal surfaces all around with a beautiful striped structure. The tourmaline is very transparent in the upper area (the last 4 mm). In this area the crystal shows bright shades of green. The crystal is covered with cleavelandite in the lower part. The termination of the crystal shows damage that should be noted.

Mineral Data
What's on the rock

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7

Cleavelandite

Variety Of: 

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Hardness: 
0.0