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Aegirine On Orthoclase

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SMS1088329

Description Tabs

Description
Locality: 
Mount Malosa, Zomba, Southern Region, Malawi
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
4.9 × 8.4 × 5.8 cm
Weight: 
185.94gr
Description

The specimen consists of a cluster of medium sized aegirine crystals that have partially covered a crystal of what appears to be aegirine partially altered to riebeckite. This outcrop is partially embedded into a large crystal fragment of orthoclase. The fragment is a cleaved portion from a larger crystal. The medium sized aegirine crystals follow a hexagonal prismatic habit with the cluster in an erratic growth habit with crystals protruding. The crystals average 1cm in the extent to which they protrude. The alteration crystals measures 4cm in height.

Mineral Data
What's on the rock

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

Orthoclase

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

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Start 11 Dec 18:00
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Postage Area Price
Europe up to 500 grams
$12
Europe up to 1 kilogram
$16
United States up to 500 grams
$14
United States up to 1 kilogram
$18
Rest of world up to 500 grams
$14
Rest of world up to 1 kilogram
$18

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