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Aragonite

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GPM1162966

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Description
Locality: 
Minglanilla, Cuenca, Castilla La Mancha, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.2 × 3.1 × 3 cm
Largest Crystal: 
3.10cm
Description

Exquisite Aragonite Twin Cluster – Minglanilla, Spain.
​This is a superb display specimen featuring an interpenetrant twin of two distinct aragonite crystals from the world-renowned locality of Minglanilla, Cuenca, Castile-La Mancha, Spain. This site is a classic European locality, famous for producing some of the most iconic "pseudo-hexagonal" aragonite twins in the mineral world.
​This specimen showcases the characteristic cyclic twinning that creates a sharp, hexagonal profile. The cluster consists of two well-formed crystals in a dynamic structural arrangement. The primary crystal reaches a significant size of 3.1 cm, showing excellent form and structural integrity.
​The colouration is a classic light brownish-tan, resulting from the characteristic inclusion of the surrounding Triassic Keuper marl/clay matrix during crystal growth. In direct light, the specimen has translucent edges, a clear luster, and sharp crystal faces.

Collected: 
2025
Mineral Data
What's on the rock

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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Start 25 Jan 18:00
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12
Europe 2**
12
North America***
40
Australia and Oceania****
15
Asia, South America, Africa*****
15

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