Template:Copal
From The Gemology Project
Copal | ||
---|---|---|
Chemical composition | Fossilized, semi-fossilized resin | |
Crystal system | Amorphous | |
Habit | None, Amorphous | |
Cleavage | None | |
Fracture | Uneven-Conchoidal | |
Hardness | 2 | |
Refractive index | 1.540 (-0.010) | |
Specific gravity | 1.06 (+.04,-.03) | |
Lustre | Resinous | |
Seperations | Amber:Copal is rapidly attacked with acetone (2-3 seconds) whereas ambr is usually not effected or just slightly attacked in the same period of time |