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Fluorite On Quartz

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MGR586293

Fluorite On Quartz

Description Tabs

Description
Locality: 
Kudubis Farm 19, Dâures, Erongo Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.4 × 5.2 × 3.1 cm
Description

Yes - you see right: This is really an Alien-fluorite and the main crystal is 34mm across, 27mm on edges! First of all some locality informations: the small miners followed the fluorite vein more than 40 meters deep. After some of them lost their life (caused by too less oxygen inside their adit, the work was stopped and since that time no more material was found. Next to pink fluorites from Alps this is the most wanted, most appreciated stuff in the space of fluorite. The "Alien-eye" in the center is not jus a funny color-zoning - this is a phantom of a cub-octahedral crystal of first generation inside a larger cub-octahedral crystal of second generation - and this is unique world-wide. I add one photo to the gallery, that shows the genesis of a „common“ Alien. It is a green crystal of first generation with dark modifications of 111 (octaeder) along corners, inside of a crystal of second generation with same habit, but nearly colorless only with the dark modifications of octaeder. One thing they all have in common: the green „alien eye“ in the center. And now this particular specimen – the crystal of first generation is yellow!!! And the second generation is green!!! A yellow alien-eye inside a green crystal. This is unique, maybe the only one ever exist! The 4th and the 5th photo shows the specimen without any light source. You can see the wonderful, emerals green color, minor violet zoning along edges and you get an idea, that there is a phantom in the dark center. The phantom is present, you also can imagine that it could be yellow – but it needs moderately backlight to show the intensity of color. The first 3 photos show the specimen with minor backlight. Next to color you can see a lot of tiny, sharp steps – these are all sharp and really lustrous (luster is better in person). 

The Quartz crystal shows light grey-brown tones and it is partly glossy. The backside is healed, the specimen is developed as floater. The "Alien-eye" is vsisble via 5 faces of this complete crystal, only one side is resting on the quartz. Most of all specimen from the locality are single crystals, so also this indicator is remarkable. Probbaly the very best specimen we ever showed on e-rocks!

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White
Analysis
Analysis Report - only: Fluorite On Quartz