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Astrophyllite With Elaeolite & Aegirine

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LGM840473

Astrophyllite With Elaeolite & Aegirine

Ex Dr. Krantz, Bonn, Germany
With Antique Label

Description Tabs

Description
Locality: 
Langesundsfjorden, Larvik, Vestfold og Telemark, Norway
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 7.5 × 3.5 cm
Weight: 
215.00gr
Description

A platy crystal of golden-brown astrophyllite is in-grown in light grey feldspar matrix. Associated with black aegirine and brownish elaeolite (fatstone, oilstone) with a light blue hint.

From old Dr. Krantz stock, comes with antique label of an unknown french collection.

Mineral Data
What's on the rock

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

Elaeolite

Variety Of: 

Nepheline

Formula: 
(Na,K)AlSiO4
Strunz: 
9.FA.05
Hardness: 
5.5 - 6.0
Hardness: 
0.0

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

Seller Information

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