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Guimarãesite & Fluor-elbaite

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SER1003289

Guimarãesite & Fluor-elbaite

Type Locality

Description Tabs

Description
Locality: 
Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 4.1 × 3.1 cm
Description

a large specimen of albite covered by thousands of tiny, platy , tetragonal crystals of guimaraesite and some blue-green fluorelbaite crystals; this mine, type locality for the specie, is closed since a long time so it is hard to find now on market  this rare beryllium phosphate

Mineral Data
What's on the rock

Guimarãesite

Formula: 
Ca2(Zn,Mg,Fe2+)5Be4(PO4)6(OH)4·6H2O
Strunz: 
8.DA.10
Hardness: 
0.0
Type Locality: 
Guimarãesite occurrence, Piauí valley, Taquaral, Itinga, Jequitinhonha valley, Minas Gerais, Brazil

Fluor-elbaite

Formula: 
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F
Hardness: 
0.0
Streak: 
White
Type Locality: 
Cruzeiro mine, São José da Safira, Doce valley, Minas Gerais, Brazil

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Start 09 Apr 18:00
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