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Bornite & Piemontite

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SER132641

Bornite & Piemontite

Type Locality

Description Tabs

Description
Locality: 
Prabornaz Mine, Saint-Marcel, Aosta Valley, Italy
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 2 × 1.2 cm
Description

A quarz matrix specimen with vugs full of black, bright bornite crystals with red piemontite from the type locality

Mineral Data
What's on the rock

Bornite

Formula: 
Cu5FeS4
Strunz: 
2.BA.15
Crystal System: 
Tetragonal
Hardness: 
3.0
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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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