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Microcline Var Manebach Twin & Aegirine

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PDM872595

Microcline Var Manebach Twin & Aegirine

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 5.4 × 3.8 cm
Weight: 
111.00gr
Description

Group of light cream coloured microcline crystals with small black aegirine crystals. The two main microcline crystals are related by a Manebach twin, with a clearly visible re-entrant angle at the top of the specimen from the front to the rear.

Former Jan Sibtsen Collection #191.

Mineral Data
What's on the rock

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Triclinic - Pinacoidal
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Arendal, Aust-Agder, Norway

Aegirine

Formula: 
NaFe3+Si2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.25
Crystal System: 
Monoclinic
Hardness: 
6.0
Type Locality: 
Rundemyr, Øvre Eiker, Buskerud, Norway

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