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Piemontite

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ZLT153657

Piemontite

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Description
Locality: 
Jokkmokk, Norrbotten County, Sweden
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 4.5 × 1.8 cm
Description

Massive fine crystalline piemontte as a mostly monomineralic rock. Collected at a canoe tour in 1980.

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

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