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Pickeringite

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GND35433

Pickeringite

Description Tabs

Description
Locality: 
Matupi Island, East New Britain Province, Papua New Guinea
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 5 × 4.4 cm
Description

A rather unusual occurence for this soft yellow MgAl sulphate. This area is a highly active volcanic one and one presumes this specimen comes from the volcanic deposits on the island.

The specimen is very light and delicate but is very attractive with masses of long radiating yellow  acicular crystals. Great specimen for the locality and the species.

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...
Gondwana Minerals