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Gillulyite

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Gillulyite

Description Tabs

Description
Locality: 
Lulu Cut, South Mercur Pit, Tooele County, Utah, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.3 × 0.9 cm
Description

Dark cherry red gillulyite from the Lulu cut, South Mercur Pit, Utah, USA. 

Unusual Tl mineral, related to lorandite. 

Mineral Data
What's on the rock

Gillulyite

Formula: 
Tl2(As,Sb)8S13
Strunz: 
2.JC.10
Hardness: 
2.0 - 2.5
Type Locality: 
Lulu cut, South Mercur Pit, Mercur District (Camp Floyd District), Oquirrh Mts, Tooele Co., Utah, USA