| Petrified Wood |
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Petrified wood is a type of where all the organic materials have been replaced with Mineral s (most often a Silicate , such as Quartz ), while retaining the original structure of the wood. The Petrifaction process has occurred underground, when wood became buried under Sediment . Mineral-rich water flowing through the sediment deposited minerals in the plant's cells and as the plant's Lignin and Cellulose decayed away, a Stone cast was formed in its place. Minerals such as Manganese , Iron , and Copper in the water/mud during the petrification process give petrified wood a variety of color ranges. Quartz Crystals are colorless, but when Iron is added to the process the crystals become stained with a yellow or red tint. Following is a list of minerals and related color hues:
Petrified wood can preserve the original structure of the wood in all its detail, down to the microsopic level. Structures such as Tree Ring s and the various tissues are often observed features. Petrified wood has a Mohs Hardness Level of 7, the same as quartz. Materials scientists have been able to make artificial petrified wood recently {Link without Title} . Petrified wood is also the state gem of Washington . LOCATIONS
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