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Dachiardite-Ca & Ferrierite-Mg

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GMN534933

Dachiardite-Ca & Ferrierite-Mg

Description Tabs

Description
Locality: 
Torintás Field, Regéc, Zemplén Mountains, Borsod-Abaúj-Zemplén County, Hungary
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.2 × 1.4 cm
Description

A lot of well formed clusters of translucent Dachiardite Ca crystal aggregates and nice sprays of brown (Fe oxides) acicular crystals on andesite matrix.

Rich, and aesthetical specimen

Mineral Data
What's on the rock

Dachiardite-Ca

Formula: 
(Ca,Na2,K2)5Al10Si38O96·25H2O
Strunz: 
9.GD.40
Crystal System: 
Monoclinic
Hardness: 
4.0 - 4.5
Type Locality: 
La Speranza (Pisani's Quarry), San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy...

Ferrierite-Mg

Formula: 
(Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72]·18H2O
Strunz: 
9.GD.50
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Streak: 
White
Type Locality: 
Kamloops Lake, Kamloops Mining Division, British Columbia, Canada

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