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Hydroxylgugiaite & Bertrandite

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SER1166512

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Description
Locality: 
Alpe Rosso, Orcesco, Druogno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.5 × 2.5 cm
Description

several tiny, white, flat, rounded crystals of hydroxylgugiaite on albite with a cluster of colourless bertrandite crystals ; self collected on 2002

Mineral Data
What's on the rock

Hydroxylgugiaite

Formula: 
(Ca,□)2(Si,Be)(Be,Si)2O5(OH)2
Group Parent: 
Melilite Group
Crystal System: 
Tetragonal
Hardness: 
5
Colour: 
Pale yellowish, white, grey
Type Locality: 
Nakkaalaaq, Taseq area, Ilímaussaq complex, Narsaq, Kujalleq, Greenland Or Blåfjell, KLangangen, Porsgrunn, Telemark, Norway Or Saga 1 Quarry, Sagåsen, Mørje, Porsgrunn, Telemark, Norway

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 24 Feb 18:00
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