Difference between revisions of "Template:Chalcedony"
From The Gemology Project
Africanuck (talk | contribs) |
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| Crystal system || Trigonal | | Crystal system || Trigonal | ||
|- | |- | ||
| − | | Habit || | + | | Habit || aggregate |
|- | |- | ||
| − | | | + | | Fracture || conchoidal |
|- | |- | ||
| − | | | + | | Hardness || 6.5-7 |
|- | |- | ||
| − | + | | Refractive index || 1.535 - 1.539 | |
| − | |||
| − | |||
| − | |||
| − | | Refractive index || 1. | ||
|- | |- | ||
| − | + | | Specific gravity || 2.60 | |
| − | |||
| − | |||
| − | |||
| − | | Specific gravity || 2. | ||
|- | |- | ||
| Lustre || Vitreous | | Lustre || Vitreous | ||
| − | |||
| − | |||
|} | |} | ||
Revision as of 14:22, 21 November 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 |
