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Macfallite

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Macfallite

Type Locality

Description Tabs

Description
Locality: 
Copper Harbor, Keweenaw County, Michigan, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.1 × 1 × 0.9 cm
Description

Brown crystals of the rare manganese mineral macfallite from the type locality in Michigan.

Mineral Data
What's on the rock

Macfallite

Formula: 
Ca2(Mn3+,Al)3(Si2O7)(SiO4)(OH)3
Strunz: 
9.BG.15
Crystal System: 
Monoclinic
Hardness: 
5.0
Type Locality: 
Manganese Mine, Copper Harbor, Keweenaw Co., Michigan, USA

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