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Piemontite

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SHS26991

Piemontite

ex. Collection Ingemar Johannson (Kopparberg/Sweden)

Description Tabs

Description
Locality: 
Jakobsberg Mine, Nordmark, Filipstad, Värmland County, Sweden
Size Range: 
Cabinet (10-18 cm)
Size: 
12.5 × 10.3 × 5 cm
Largest Crystal: 
1.50cm
Description

Red-violett piemontite crystals and massiv piemontite on matrix. a heavy piece

Mineral Data
What's on the rock

Piemontite

Formula: 
{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Strunz: 
9.BG.05
Hardness: 
6.0 - 6.5
Streak: 
Reddish
Type Locality: 
Prabornaz Mine (Praborna Mine), Saint-Marcel, Aosta Valley, Italy