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Emerald
The Emerald is a beryl and the chemical formula is Al2Be3[Si6O18]. It is a
complex linkage. The ligand Si6O18 is a cyclosilicate. This means that the atomes in the molecule form
a ring. The hardness is about 7.5 to 8 and the crystal system is hexagonal. The Emerald is green. The green color is caused by admixtures of chromium oxide. He belongs to the most
expensive stones on Earth. In antiquity many jewels were made of this stone. Many Emeralds are found in Columbia, Brazil and
Russia. Until today we find this stone in jewels. In antiquity people thought that he has got positive effects.
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Data about the Emerald
| | Chemical formula |
Al2Be3[Si6O18] |
|---|
| Mineral class |
silicates |
|---|
| Crystal system |
hexagonal |
|---|
| Hardness |
7.5 to 8 |
|---|
| Density |
2.6 g/cm3 to 2.8 g/cm3 |
|---|
| Color |
green |
|---|
| Line color |
white |
|---|
| Gloss |
glass gloss |
|---|
| Break |
shell |
|---|
| Fissileness |
none |
|---|
Author and Webmaster: Lukas Czarnecki
If you have got questions about emerald you can send me an e-mail under the following adress:
webmaster@hpwt.de
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Last Update: 03.11.2004
