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Guimarãesite & Elbaite

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SER541791

Guimarãesite & Elbaite

Type Locality

Description Tabs

Description
Locality: 
Piauí Valley, Taquaral, Itinga, Minas Gerais, Brazil
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3.2 × 2.1 cm
Largest Crystal: 
1.60cm
Description

Thousands tiny, bright yellow, platy crystals of guimaraesite on green, lustrous crystals of elbaite (probabily fluor-elbaite) from the type locality : Guimaraesite occourence, Piauì valley, Taquaral: Bought in Araçuaì on 2012

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

Elbaite

Formula: 
Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.5
Streak: 
White
Type Locality: 
Fonte del Prete, San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy...