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Pickeringite

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SHS779922

Pickeringite

Description Tabs

Description
Locality: 
Alum Mine, Alum, Esmeralda County, Nevada, United States of America
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5 × 3.1 cm
Description

Nice piece of alum

Mineral Data
What's on the rock

Pickeringite

Formula: 
MgAl2(SO4)4·22H2O
Strunz: 
7.CB.85
Hardness: 
1.5 - 2.0
Type Locality: 
Cerros Pintados ("Cerro Pintados"), Pampa del Tamarugal, El Tamarugal Province, Tarapacá Region, Chile...