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Spessartine & Opal-AN On Microcline

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CLB639165

Spessartine & Opal-AN On Microcline

Fluorescent

Description Tabs

Description
Locality: 
Tongbei, Yunxiao County, Zhangzhou Prefecture, Fujian Province, China (Peoples Republic)
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
17.6 × 10.4 × 3 cm
Weight: 
457.00gr
Description

Imagine you show this impressive spessartine specimen to friends one evening and then switch of the room light and on your shortwave UV ... and the -not-so-spectacular 'lame' edge with the boring, shapeless transparent 'stuff' lights up bright green ... That's the opal-an or 'hyalite'. Well, the orange spessartine crystals are not so bad either.

This specimen was one of my favorite for a long time. If not for that change of my collecting focus it would never be here.

 

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

Opal-AN

Variety Of: 

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Formula: 
SiO2·nH2O
Hardness: 
5.5 - 6.5
Streak: 
white

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Crystal System: 
Triclinic - Pinacoidal
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Arendal, Aust-Agder, Norway

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