PETRIFIED WOOD Rough - 1/2 Lb Lot of Medium Size Fossil Petrified Wood Rough Tumbling Faceting Wire Wrap Beads from Arizona by GeoSpecimens Total Weight: 8+ Oz. Quantity: 5-8 Stones. Size: Approx. 1/2-2" Each Locality: Holbrook, AZ This sale is for a 1/2 Lb. lot of undrilled Petrified Wood rough stones similar in quality and size to the stock photo and from the same batch as those pictured. These lots contain approximately 5-8 stones - most weighing 1/2-2 ounces each. PETRIFIED WOOD PROPERTIES: Petrified wood is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization. All the organic materials have been replaced with minerals (mostly a silicate, such as quartz), while retaining the original structure of the stem tissue. Unlike other types of fossils which are typically impressions or compressions, petrified wood is a three-dimensional representation of the original organic material. The petrifaction process occurs underground, when wood becomes buried under sediment and is initially preserved due to a lack of oxygen which inhibits aerobic decomposition. Mineral-laden water flowing through the sediment deposits minerals in the plant's cells; as the plant's lignin and cellulose decay, a stone mould forms in its place. The organic matter needs to become petrified before it decomposes completely. Elements such as manganese, iron, and copper in the water/mud during the petrification process give petrified wood a variety of color ranges. Pure quartz crystals are colorless, but when contaminants are added to the process the crystals take on a yellow, red, or other tint. Courtesy of Wikipedia
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