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Pyrolusite

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PAV873401

Pyrolusite

Classic Locality

Description Tabs

Description
Locality: 
Serra da Mina Mine, Cercal, Santiago do Cacém, Setúbal District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 1.9 × 2.1 cm
Description

Group of prismatic pyrolusite crystals. Unusual for the locality.

Hard to find these days. Defunct locality.

Collected: 
2016
Boxed with Label
Mineral Data
What's on the rock

Pyrolusite

Formula: 
MnO2
Strunz: 
4.DB.05
Hardness: 
2.0 - 6.5