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Helvine Specularite On Quartz

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SLN748410

Helvine Specularite On Quartz

Description Tabs

Description
Locality: 
Jinlong Hill, Longchuan County, Heyuan, Guangdong Province, China (Peoples Republic)
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
4.6 × 8.1 × 7.3 cm
Largest Crystal: 
2.10cm
Weight: 
268.00gr
Description

Nice specimen from China with a very interesting association of black helvine in some excellent tetrahedral crystals, heamatite var specularite in black lamellar crystals and pinkish quartz. The biggest helvine crystal measures 2.1 X 1.5 Cm

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

Specularite

Variety Of: 

Hematite

Formula: 
Fe2O3
Strunz: 
4.CB.05
Hardness: 
5.0 - 6.0
Colour: 
Silvery

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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$35
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