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Crookesite

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SHS529106

Crookesite

Description Tabs

Description
Locality: 
Varuträsk, Skellefteå, Västerbotten County, Sweden
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.5 × 2.5 cm
Description

Crookesite in matrix

Mineral Data
What's on the rock

Crookesite

Formula: 
Cu7(Tl, Ag)Se4
Strunz: 
2.BD.50
Crystal System: 
Tetragonal
Hardness: 
2.5 - 3.0
Colour: 
Lead Grey
Type Locality: 
Skrikerum Mine (Skrickerum Mine), Valdemarsvik, Östergötland, Sweden