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Elbaite Eosphorite & Cookeite

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SER796398

Elbaite Eosphorite & Cookeite

Description Tabs

Description
Locality: 
Pirineus Claim, Monte Belo, Itinga, Minas Gerais, Brazil
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
10.5 × 5.6 × 3.6 cm
Description

a large cluster of white blades of albite var cleavelandite hosts some blue electric elbaite crystals, brown eosphorite crystals abd several cookeite prisms

Mineral Data
What's on the rock

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...

Eosphorite

Formula: 
(Mn2+,Fe2+)Al(PO4)(OH)2·H2O
Strunz: 
8.DD.20
Crystal System: 
Orthorhombic
Hardness: 
5.0
Streak: 
White
Type Locality: 
Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA

Cookeite

Formula: 
(Al2Li)Al2(AlSi3O10)(OH)8
Strunz: 
9.EC.55
Hardness: 
2.5 - 3.5
Streak: 
White
Type Locality: 
Mount Mica Quarry (Mount Mica Mine), Paris, Oxford Co., Maine, USA