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Piemontite & Tinzenite

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UVM837787

Piemontite & Tinzenite

Description Tabs

Description
Locality: 
Ash Canyon, Hartford, Huachuca Mountains, Cochise County, Arizona, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.1 × 2.3 × 1.7 cm
Description

Raspberry colored crystals and partial crystals of piemontite with minor peach colored tinzenite in association.   This was from a small but important find about a decade ago that produced two major specimens of piemontite that may represent the best of species.   In addition, perhaps a dozen small specimens such as this were also produced.   No further production of the material has been seen.   

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

Tinzenite

Formula: 
(Ca,Mn2+)2Mn2+Al2BSi4O15(OH)
Strunz: 
9.BD.20
Crystal System: 
Triclinic - Pinacoidal
Hardness: 
6.5 - 7.0
Type Locality: 
Parsettens Alp, Tinizong (Tinzen), Oberhalbstein (Surses; Sursass), Albula Valley, Grischun (Grisons; Graubünden), Switzerland

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