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Iltisite & Perroudite

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SKY610812

Iltisite & Perroudite

Rare Mineral

Description Tabs

Description
Locality: 
Las Cocotas Mine, Tíjola, Andalusia, Spain
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1.7 × 1.5 cm
Description

Very small but sharp black crystals of the extremely rare mineral iltisite grown on orange acicular perroudite crystals in an outstanding specimen for the species. Very sought after mineral in this quality and rarely seen on the mineral market.  Iltisite has only been found in 3 localities worldwide. Very nice under the microscope !

Iltisite is a Bromine (Br) mineral. Only 17 of 5000 minerals known are bromine mineral so it is a real chemical rarity.

Mineral Data
What's on the rock

Iltisite

Formula: 
HgAgS(Cl,Br)
Strunz: 
2.FC.20b
Crystal System: 
Hexagonal
Hardness: 
0.0
Type Locality: 
Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France...

Perroudite

Formula: 
Hg5Ag4S5(I,Br)2Cl2
Strunz: 
2.FC.20c
Hardness: 
2.0
Type Locality: 
Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France...

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