Difference between revisions of "Template:Chalcedony"

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| Crystal system || Trigonal
 
| Crystal system || Trigonal
 
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| Habit || edit me
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| Habit || Aggregate
 
|-
 
|-
| Cleavage || edit me
+
| Fracture || Conchoidal
 
|-
 
|-
| Fracture || edit me
+
| Hardness || 6.5-7
 
|-
 
|-
| Hardness || 7
+
| Refractive index || 1.535 - 1.539
|-
 
| Optic nature || edit me
 
|-
 
| Refractive index || 1.544 - 1.553
 
 
|-  
 
|-  
| Birefringence || 0.009
+
| Specific gravity || 2.60
|-
 
| Dispersion || 0.013
 
|-
 
| Specific gravity || 2.63 - 2.65
 
 
|-
 
|-
 
| Lustre || Vitreous
 
| Lustre || Vitreous
|-
 
| Pleochroism || edit me
 
 
|}
 
|}

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