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Helvine Smoky Quartz & Muscovite

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FRN99716

Helvine Smoky Quartz & Muscovite

Description Tabs

Description
Locality: 
Yunxiao County, Zhangzhou, Fujian Province, China (Peoples Republic)
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.1 × 2.2 × 3.1 cm
Description

Two complete, fully developed and well formed orange Helvite crystals set on a matrix covered with small muscovite crystals and smoky quartz. All crystals are complete.

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

Smoky Quartz

Variety Of: 

Quartz

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

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White
Oriental Minerals