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Sellaite & Fluoro-richterite

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SER1081448

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Description
Locality: 
Emmelberg, Üdersdorf, Daun, Eifel, Rhineland-Palatinate, Germany
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.5 × 2.2 cm
Description

several opaque white sellaite crystals on sanidine with yellow-orange fluor-richterite crystals 

Mineral Data
What's on the rock

Sellaite

Formula: 
MgF2
Strunz: 
3.AB.15
Crystal System: 
Tetragonal
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Gébroulaz glacier, Val Thorens, Savoie, Rhône-Alpes, France

Fluoro-richterite

Formula: 
{Na}{CaNa}{Mg5}(Si8O22)(F,OH)2
Strunz: 
9.DE.20
Crystal System: 
Monoclinic
Hardness: 
5.0 - 6.0
Streak: 
white
Type Locality: 
Pit No. 97 (N97 Mine), Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia...

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Start 19 Nov 18:00
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