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Agate Agate

Agate is modification of the quartz, because it has not got big crystals, but only microscopical crystals. The chemical formula is SiO2. The crystal system is trigonal and the hardness is 7. Agate is unregular. He exists in many colors. Often we can find agate stones which are hollow and inside we can find Amethyst crystals. Often an agate consists of many color layers which are arranged radiale. Agate contains onyx, sardonyx, eye agate, moss agate, dendrite agate, flame agate, fire agate and many more. In Brazil and Uruguay we can find most agate, but in other parts of the world there is also agate. Because of this ring structure agate is good for ashtrays, like petrified wood, because so we can see the whole stone. Agate is used for chains and jewels. In former times in Egypt and also in other parts of the world different things were made of agate.

Data about Agate
Chemical formula SiO2
Mineral class oxides
Crystal system trigonal
Hardness 7
Density 2.6 g/cm3
Color many colors
Line color white
Gloss glass gloss, fat gloss
Break shell
Fissileness none

Author and Webmaster: Lukas Czarnecki

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Last Update: 07.10.2006