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Spessartine Piemontite & Viridine

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AST1038535

Spessartine Piemontite & Viridine

Description Tabs

Description
Locality: 
Trikorfo, Theologos, Thasos, East Macedonia and Thrace, Greece
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 5 × 1.2 cm
Description

Spessartine crystals with red-violet piemontite and minor green viridine on both sides of matrix. Specimen is from a German collection, label included.

Mineral Data
What's on the rock

Spessartine

Formula: 
Mn2+3Al2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.5
Streak: 
White
Type Locality: 
Sommer quarry, Wendelberg, Haibach, Aschaffenburg, Spessart, Franconia, Bavaria, Germany

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

Viridine

Variety Of: 

Andalusite

Formula: 
Al2(SiO4)O
Strunz: 
9.AF.10
Hardness: 
6.5 - 7.5
Formula: 
(Al,Mn3+)2SiO4O
Hardness: 
0.0

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