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Helvine Pyrite Smoky Quartz & Spessartine

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PFK92955

Helvine Pyrite Smoky Quartz & Spessartine

Description Tabs

Description
Locality: 
Tongbei, Yunxiao County, Zhangzhou Prefecture, Fujian Province, China (Peoples Republic)
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 6 × 3 cm
Description

A very rare combination of 6 minerals: A lustrous golden pyrite cube is sitting atop a matrix of feldspar crystals associated with gemmy smoky quartz, muscovite and small orange spessartines.

Two yellow-orange helvite crystals are perched on a side of the specimen.

I have to note that pyrite and helvite are considered to be rarities from Tongbei.

Mineral Data
What's on the rock

Helvine

Formula: 
Mn2+4(Be3Si3O12)S
Strunz: 
9.FB.10
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Friedefürst Mine, Breitenbrunn, Breitenbrunn District, Erzgebirge, Saxony, Germany

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

Smoky Quartz

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
SiO2
Hardness: 
0.0

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

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