Rocks That Look Like Petrified Wood
The jet found at Whitby in England is the Jet Rock unit of the Mulgrave Shale Member which is part of the Whitby Mudstone Formation.
Rocks that look like petrified wood. But you should post more pictures for definite id especially on the grain texture. Unlike other types of petrified wood jet does not have the original shape and structure of the preserved wood. Also foliated metamorphic rocks like schist will tend to have a variety of minerals in them like silvery mica reddish garnets etc whereas petrified wood is usually a single silicate mineral.
Jet does start the same way with dead wood buried underground. It could be impossible to identify. The petrified wood here usually has not agatized fully - that is silicon oxide quartz crystals have not filled the gaps in the cells.
Agatized wood feels like jasper smooth and of a piece. Elements such as manganese iron and copper in the watermud during the petrification process give petrified wood a variety of color ranges. I have picked up only three pieces of surf tumbled petrified wood in my years of beach combing and they were all found on Damon Point beach at Ocean Shores WA.
Pure quartz crystals are colorless but when contaminants are added to the process the crystals take on a yellow red or another tint. It would be mineral deposits in the shape of a piece of wood. Rock looks like Petrified Wood Save PREV NEXT Castlereagh.
The average piece of petrified wood is not bright or translucent. But over millions of years jet undergoes a different process where it is heated and compressed. Keep an eye out for little bits of sap or sap-like colors like red often strong reds orange and tan around the smooth parts.
Is the piece your valuing solid and rock like. From a recently discovered locality in Eastern Germany this unique petrified wood is replete with sparkling druzy quartz crystalline structures contrasting with the warm earthy brown mineral replacement of the original wood. The silica replaced the wood material organic matter part by part and this is known as petrification By passing time the wood changes into rocks which carry the same details of wood without change.