Bookends petrified wood

Couple of bookends of petrified wood⁠
brown, grey coloured ⁠
Two cutting sides are protected with ⁠felt⁠
millions of years ⁠old⁠
5.2 kg⁠
H 16cm, W 16cm, D 8cm⁠
⁠
Petrified wood is the result of a process that is over millions of years old, when a tree's trunk has turned into stone by the process of permineralization.⁠
Petrification of wood occurs when a tree falls and is covered by sediment. If that covering happens quick enough and complete enough, it will create an environment around the tree that is free from oxygen. This lack of oxygen protects the structure of the tree from rotting and decaying. If conditions allow, groundwaters rich in silica, calcite, and other minerals, will seep through the buried tree and replace the organic material with inorganic material. Given the rigidity of plant cell walls, these structures act as a blueprint for the replacement to take the exact shape of the preexisting material. What you are left with is a non-carbon-copy of the tree made of rock instead of organic matter.⁠
Depending on the minerals present in groundwater during the fossilization process, petrified wood can be a variety of different colors.⁠
 
This item cannot be shipped because of its weight. Can be collected or personally delivered in Belgium, by appointment⁠. The indicated price does not include transport costs.