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Piemontite

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SKY578425

Piemontite

New Discovery

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Description
Locality: 
Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Cote d'Azur, France
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 2 × 1.8 cm
Description

Red wine crystals of piemontite from Cap Garonne. This is the only known specimen of piemontite from Cap Garonne! New discovery, the specimen was originally labeled as iltisite + capgaronnite, but after analysis it proved to be a new species for the locality. After close examination of the specimen it proved not to have iltisite or capgaronnite, only 3 crystals of piemontite.

Analyzed specimen by Raman spectrocopy, see copy attached. The photos and the analysis have been uploaded in mindat.

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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Start 23 May 18:00
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