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Hydroxylherderite & Tourmaline

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CR689513

Hydroxylherderite & Tourmaline

Rare Mineral

Description Tabs

Description
Locality: 
Hunza Valley, Gilgit-Baltistan, Pakistan
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 7.5 × 7.5 cm
Largest Crystal: 
1.80cm
Description

Several very sharp, white to pale green and lustrous hydroxylherderite crystals up to 18 mm on a beautiful matrix of gemmy quartz crystals with mica and nice terminated tourmaline crystals.

Very good and attractive specimen !

Mineral Data
What's on the rock

Hydroxylherderite

Formula: 
CaBe(PO4)(OH,F)
Strunz: 
8.BA.10
Crystal System: 
Monoclinic
Hardness: 
5.0 - 5.5
Streak: 
white

Tourmaline

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