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Aegirine With Astrophyllite In Nepheline

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GND27260

Aegirine With Astrophyllite In Nepheline

Classic Locality

Description Tabs

Description
Locality: 
Lagendalen, Larvik, Vestfold, Norway
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 5 × 2.2 cm
Description

A multitude of black unterminated aegirine crystals criss cros the specimen and are associated with some minor brown astrophyllite crystals in the nepheline matrix.

A good reference specimen from this interesting pegmatite deposit.

Comes with an older typed label.

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

Astrophyllite

Formula: 
(K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7
Strunz: 
9.DC.05
Crystal System: 
Triclinic
Hardness: 
3.0
Streak: 
Golden
Type Locality: 
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway

Nepheline

Formula: 
(Na,K)AlSiO4
Strunz: 
9.FA.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy
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