This is a richly colored slab of petrified Araucaria (Conifer) wood from Ambilobe, Madagascar. This 220 million year old petrified wood has been sliced and polished allowing the stunning inner wood detail and fantastic coloration to easily be seen. It comes with an acrylic display stand.
There is a crack that runs through the middle of this wood slab, however there is no indication that there have been any repairs made to this slab.
Petrified wood is the name given to wood that has been turned into stone (fossilized) through the process of permineralization. All of the organic matter becomes replaced by minerals, while much of the original structure such as tree rings in retained. For this to happen the wood needs to be buried in an environment both low in oxygen (preventing decomposition) and with flowing, mineral-laden water.