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Sapphire
The Sapphire is a corundum. The chemical formula is Al2O3. He is blue because of iron and titanium. He
has got the hardness 9 and he is trigonal. After the diamond, the sapphire and the ruby are the hardest stones. In Rome people said that he has got positive effects. In antiquity the Sapphire was used for jewels and in expensive jewels we find him
until today. There are several versions of the Sapphire which are caused by admixtures. A version is the Star sapphire which
is not transparent. He has got this name because of the six arms which meet in the middle. All this looks like a star. We can
find Sapphires in Burma and Thailand. Today they are rare.
|
Data about the Sapphire
| | Chemical formula |
Al2O3 |
|---|
| Mineral class |
oxides |
|---|
| Crystal system |
trigonal |
|---|
| Hardness |
9 |
|---|
| Density |
4 g/cm3 |
|---|
| Color |
blue |
|---|
| Line color |
white |
|---|
| Gloss |
glass gloss |
|---|
| Break |
shell |
|---|
| Fissileness |
divisibly |
|---|
Author and Webmaster: Lukas Czarnecki
If you have got questions about sapphire you can send me an e-mail under the following adress:
webmaster@hpwt.de
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Last Update: 03.11.2004
