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Analcime

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QRI770832

Analcime

With Antique Label

Description Tabs

Description
Locality: 
Chetaibi, Wilaya de Skikda, Annaba Province, Algeria
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.8 × 4.9 × 2.1 cm
Largest Crystal: 
1.20cm
Weight: 
36.00gr
Description

Late 2019 I have come across this very interesting small lot of analcime from the locality of Chetaibi, Algeria.
Analcime consists of sizeable, water clear crystals of good size, nicely perched on solid matrix, often associated to white-yellowish spatic calcite. In this very specimen, two main crystals stand out of a vug. Lustre is outstanding and transparency is remarkable on the outer rims of the crystal, to the point of being hard to depic.

I have never seen those specimens on the market before, and I think they do set a high standard among African analcime. From a small find from a Swiss engineer in the 60s (possibly from a roadcut?), only a few specimens were recovered.

This is one of the best of the entire lot.

Pasted Label
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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