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Quartz Fluorite Schorl & Hyalite

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ATH666857

Quartz Fluorite Schorl & Hyalite

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Single Crystal
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.8 × 5 × 3 cm
Weight: 
132.00gr
Description

Quartz, fluorite, schorl & hyalite from Erongo Mountains, Namibia.

A lot of dark purple/blue fluorites are settled on an undamaged rock crystal. Between the fluorite you can find a lot of small schorl needles.

Looking like a "film" on the top of the quartz is a massive hyalite layer. With ultraviolet light you can spot the amazing lime-green.

 

Mineral Data
What's on the rock

Quartz

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

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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

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