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Pumpellyite-(Mg)

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CHA711211

Pumpellyite-(Mg)

Classic Locality

Description Tabs

Description
Locality: 
Obří důl, Krkonoše Mountains, Hradec Králové Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.5 × 3.2 cm
Description

specimen with many tufts of nice light green needles of pumpellyite-(Mg) on matrx of quartz

Mineral Data
What's on the rock

Pumpellyite-(Mg)

Formula: 
Ca2MgAl2(Si2O7)(SiO4)(OH)2·H2O
Strunz: 
9.BG.20
Crystal System: 
Monoclinic
Hardness: 
5.5
Streak: 
White
Type Locality: 
Keweenaw Co., Michigan, USA

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