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Milarite & Bertrandite

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WND836907

Milarite & Bertrandite

Rare Mineral
Classic Locality

Description Tabs

Description
Locality: 
Burg - Fiesch Glacier, Fieschertal, Goms, Valais, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 6.4 × 4.6 cm
Largest Crystal: 
1.60cm
Description

This stunning piece is by far the rarest we ever offered in an auction. Not just for the species,- it is  the alpine locality where this great Milarite specimen comes from. Alpine Milarites are objects of  highest desire,- and in this size they are actually not to come by. Here you see an excellent defined crystal with six-sided habit and one superb termination which is multifaced as well. The crystal is perched atop of a matrix, covered with sharp, white crystals of Adularia. The Milarite has contacts of desolved Bertrandite.This is an alpine super piece for highest demands in every sense.

Mineral Data
What's on the rock

Milarite

Formula: 
K2Ca4Al2Be4Si24O60·H2O
Strunz: 
9.CM.05
Hardness: 
6.0
Type Locality: 
Giuv Valley, Tujetsch (Tavetsch), Vorderrhein Valley, Grischun (Grisons; Graubünden), Switzerland

Bertrandite

Formula: 
Be4(Si2O7)(OH)2
Strunz: 
9.BD.05
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 7.0
Type Locality: 
Petit-Port, Nantes, Loire-Atlantique, Pays de Loire, France

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Start 04 Apr 18:00
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Seller's terms and conditions

Our Terms & Conditions can be found at:​ https://www.wendel-minerals.com/en/shop/agb.php

 

 

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