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Fluorite

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MGR164749

Fluorite

Description Tabs

Description
Locality: 
Genoa Claim, Animas District, San Juan County, Colorado, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 9.3 × 6 cm
Description

First of all a few informations about this find; the discovery was in 1985. The Genoa-prospect is under the main route (graveled) that was a state highway and now a county road and is the main access to the Alpine Loop Scenic Byway. The mining company owned it back then and didn't mind us collecting. The Mayflower Mill is within 200 yards of the Genoa and that was an operating mill for the famous Sunnyside gold mine. The claim was sold in the mid 2000's and posted very threateningly. The specimens were found in a vug about 9 feet high, 4 feet wide and maybe 15 feet long. One wall was covered with these epimorphs. They were coated with black MnO2 and cleaned with oxalic acid. The matrix shows greenish fluorite, covered with white tiny quartz crystals. the exposed octahedron at the top is quartz psd after fluorite. very uncommon rare material and the locality produced only this one vug. If you are interested in more informations concerning this discovery, we posted an article about it on our web-site.

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