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Piemontite

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RFJ966934

Piemontite

Classic Locality

Description Tabs

Description
Locality: 
Tone Mine, Kinkai-Tone-machi, Nagasaki City, Nagasaki Prefecture, Japan
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
4.6 × 7.2 × 3.2 cm
Description

Piemontite in Quartz from Kyushu Island.

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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