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Orthoclase Var Baveno Twin & Var Manebach Twin

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PDM850763

Orthoclase Var Baveno Twin & Var Manebach Twin

Description Tabs

Description
Locality: 
Valdemanco, Madrid, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 4.5 × 4.3 cm
Weight: 
46.00gr
Description

This is an outstanding specimen of prismatic orthoclase crystals that are associated by different twins of two types: Baveno and Manebach, forming an aesthetic symmetric fourling cluster. The baveno twins are visible in the main diagonals of the group, passing throw the corners, while the Manebach twins are parallel to the main four faces of the contour. Detailled information of such type of twinning cobinations can be found, for instance, in the work of Žorž (1992).

Found in 1995. Ex Iván Blanco specimen.

 

Žorž, Mirjan (1992). Hyalophane twins from Zagradski potok in Central Bosnia. Geologija 35, 183-206.

Mineral Data
What's on the rock

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
Streak: 
White

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