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Analcime

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QRI679823

Analcime

Classic Locality

Description Tabs

Description
Locality: 
Dolni Zalezly, Ústí nad Labem Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
2.8 × 10.1 × 7.9 cm
Largest Crystal: 
0.60cm
Description

Exceptionally rich basaltic geode filled with myriads of semitransparent analcime crystals. Crystals are mostly grown as concatenated individuals, making a thick carpet that fully covers the geode. Some crystals stand out because are either overlapping one another or are quite gemmy at the top. This is the richest analcime from this locality I have even come across.

Elegant and very rare to find from this Czech locality with this richness, it comes from the former collections Lindemann and Jasker (Hamburg, Germany) and with two Dave Bunk labels (Colorado, USA; not shown).

Mineral Data
What's on the rock

Analcime

Formula: 
Na2(Al2Si4O12)·2H2O
Strunz: 
9.GB.05
Crystal System: 
Triclinic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Cyclopean Islands, Acitrezza (Aci Trezza), Etna Volcanic Complex, Catania Province, Sicily, Italy

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