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Petrified wood

Petrified wood

Petrified wood has got the chemical formula SiO2. The hardness is about 5 to 7. This may wonder, because silicon does not belong to elements with form organic linkages and wood. Wood is a linkage of carbone, but here we have got a long process. At the beginning of this process solutions of silicium dioxide (chalcedone or opal) go into fallen trees and they replace the wood piece for piece. The structure of the wood stays the same and also most of the colors. Petrified wood is yellow, yellow-brown and also grey. We can find very much Petrified wood in Holbrook in Arizona. There is a whole petrified forest. Here we can find a whole petrified forest. Petrified wood is used for several jewels. Ashtrays are a good example, because here we can see the whole cross section of a tree and even a petrified crust.

Data about Petrified wood
Chemical formula SiO2 * nH2O
Mineral class oxides
Crystal system amorph
Hardness 5 to 7
Density 1.9 g/cm3 to 2.5 g/cm3
Color many colors
Line color white
Gloss wax gloss
Break shell
Fissileness none

Author and Webmaster: Lukas Czarnecki

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Last Update: 03.11.2004