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Tourmaline Albite & Quartz

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BOC575035

Tourmaline Albite & Quartz

José Luis Otero's collection

Description Tabs

Description
Locality: 
Portugal #2 Quarry, Malpartida, Almeida, Guarda District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 2.5 cm
Largest Crystal: 
0.60cm
Description

Tourmaline (schorl), albite and quartz from Guarda district, Portugal.

Original label says 'Aldeia do Caminho, Guarda, Portugal'.

I think this specimen is of 'Portugal No. 2 quarry, Malpartida, Almeida, Guarda District, Portugal'.

José Luis Otero’s collection (serial number 220).

A quartz is broken.

Mineral Data
What's on the rock

Tourmaline

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

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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