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Tourmaline & Herderite

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MGR662552

Tourmaline & Herderite

Description Tabs

Description
Locality: 
Nyet Bruk, Braldu Valley, Skardu, Gilgit-Baltistan, Pakistan
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.6 × 2.6 cm
Description

The specimen consists of one endpointed dark tourmaline with light zoning and dark blue colour tones along the endpoint. Further it shows a jet black lustrous schorl crystal at the base, then you can see tiny quarz crystals and finally a double-headed herderite crystal. Herderite is 18 mm across, it shows light yellow colour. No significant damages to report, bottom was on the rock.

Mineral Data
What's on the rock

Tourmaline

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

Herderite

Formula: 
CaBePO4(F,OH)
Strunz: 
8.BA.10
Crystal System: 
Monoclinic
Hardness: 
5.0 - 5.5
Type Locality: 
Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
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