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Fluorite On Tourmaline

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BMM810504

Fluorite On Tourmaline

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3.2 × 2.3 cm
Description

Octahedral Fluorite with frosted and satin gloss faces on black tourmaline. The fluorite crystals are nearly colorless, with zoning of dark purple zones along edges and corners. Uncountable thin needles of schorl (black tourmaline) are intergrown in the fluorite. Both tourmalines are multiple terminated at the top and are undamaged. From one side the growth of the fluorite on the main crystal of the tourmaline reminds of a scepter (second and fourth photo)! A truly remarkable sight!

Mineral Data
What's on the rock

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

Tourmaline

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