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Schorl & Hyalite

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NST760567

Schorl & Hyalite

Description Tabs

Description
Locality: 
Davib Ost Farm 61, Karibib, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 6 × 4 cm
Description

A cluster of lustrous black Tourmaline and colorless Hyalite showing an intense yellow fluorescence under UV-light

Mineral Data
What's on the rock

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0

Hyalite

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white