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Haüyne & Aragonite

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ZLT155605

Haüyne & Aragonite

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Description
Locality: 
In den Dellen Quarries, Niedermendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
0.8 × 1.1 × 1 cm
Largest Crystal: 
0.23cm
Description

Small fraction of a sanidinite ejection block with a rare long prismatic twin of Haüyne which is covered with small prismatic aragonite crystals. Interesting specimen considered that the mineral paragenesis was built under two completely different growth conditions. minID YET-65F.

Mineral Data
What's on the rock

Haüyne

Formula: 
(Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2
Strunz: 
9.FB.10
Hardness: 
5.5 - 6.0
Type Locality: 
Lake Nemi, Alban Hills, Rome Province, Latium, Italy

Aragonite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.15
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Type Locality: 
Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain

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