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Nepheline Psm Leucite

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CR723979

Nepheline Psm Leucite

Pseudomorph

Description Tabs

Description
Locality: 
Loučná pod Klinovcem, Chomutov District, Ústí nad Labem Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 3.5 × 4 cm
Description

Very interesting specimen with the cluster of brown nepheline pseudomorphs after leucite, so-called pseudoleucite on a volcanic matrix from Loučná, Czech Republic.

Mineral Data
What's on the rock

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

Leucite

Formula: 
K(AlSi2O6)
Strunz: 
9.GB.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy