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Andalusite

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LGM880510

Andalusite

ex Alex Franz, Düsseldorf, Germany
With Antique Label

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Description Tabs

Description
Locality: 
Fuente Obejuna, Córdoba, Andalusia, Spain
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 6.5 × 4 cm
Largest Crystal: 
6.50cm
Weight: 
295.00gr
Description

A large single, blocky, terminated andalusite crystal with little silvery mica on the crystal faces.

Comes with Alex Franz label and on-glued corresponding number sticker. He was born in Göttingen in 1906 and was trained in optics at the Technical School in Jena, receiving his Master's Degree in 1929. He then joined his family's optics business in Hannover, managing it with the help of his brother in his early years, and thereafter by himself.
Franz became interested in minerals at an early age, and built a personal collection which unfortunately was lost during the chaos of the war years. Nevertheless, he built up a substantial new mineral collection following the war.
Franz died in Meerbusch, near Düsseldorf, on October 25, 2000. His collection was purchased by the mineral dealer Christian Rewitzer in Furth im Wald, and the specimens were then sold off individually.

Mineral Data
What's on the rock

Andalusite

Formula: 
Al2(SiO4)O
Strunz: 
9.AF.10
Crystal System: 
Orthorhombic
Hardness: 
6.5 - 7.5
Streak: 
White
Type Locality: 
El Cardoso de la Sierra, Guadalajara, Castile-La Mancha, Spain

Seller Information

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