Difference between revisions of "Template:Chalcedony"

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| Crystal system || Trigonal
 
| Crystal system || Trigonal
 
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| Habit || aggregate
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| Habit || Aggregate
 
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| Fracture || conchoidal
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| Fracture || Conchoidal
 
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| Hardness || 6.5-7
 
| Hardness || 6.5-7

Latest revision as of 16:59, 22 December 2006

Chalcedony
Chemical composition Silicon dioxide SiO2
Crystal system Trigonal
Habit Aggregate
Fracture Conchoidal
Hardness 6.5-7
Refractive index 1.535 - 1.539
Specific gravity 2.60
Lustre Vitreous