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Cassiterite Goshenite & Muscovite

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MGR956173

Cassiterite Goshenite & Muscovite

Description Tabs

Description
Locality: 
Mount Xuebaoding, Pingwu County, Mianyang, Sichuan Province, China (Peoples Republic)
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.1 × 6.7 × 6 cm
Description

Perfectly formed, dark black metallically lustrous single crystal of cassiterite from China. It is perfectly embedded in bright muscovite matrix and additionally this fine specimen is accompanied with colourless goshenite at the bottom.

Mineral Data
What's on the rock

Cassiterite

Formula: 
SnO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal
Hardness: 
6.0 - 7.0

Goshenite

Variety Of: 

Beryl

Formula: 
Be3Al2(Si6O18)
Strunz: 
9.CJ.05
Hardness: 
7.5 - 8.0
Hardness: 
0.0

Muscovite

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