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Muscovite With Goshenite & Fluorite

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SMS1086453

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
9 × 10.3 × 7.4 cm
Weight: 
330.65gr
Description

The yellow muscovite specimen is an epimorph after a very large carlsbad twinned crystal of orthoclase. The reverse side further reveals cast-like footprint of the of orthoclase. One of the narrow sides has a few small deep purple fluorite crystals. The front side has randomly scattered small stubby goshenite crystals to 1.5cm. These crystals are mostly lying laterally and at low angles with nearly all of them embedded in the muscovite. Some of the goshenite are doubly terminated too.

Mineral Data
What's on the rock

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White

Goshenite

Variety Of: 

Beryl

Formula: 
Be3Al2(Si6O18)
Strunz: 
9.CJ.05
Hardness: 
7.5 - 8.0
Hardness: 
0.0

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

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Start 03 Dec 18:00
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Shipping Information

Postage Area Price
Europe up to 500 grams
$12
Europe up to 1 kilogram
$16
United States up to 500 grams
$14
United States up to 1 kilogram
$18
Rest of world up to 500 grams
$14
Rest of world up to 1 kilogram
$18

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