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Sapphire 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

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Last Update: 03.11.2004