Chemical Formula: Sio 2nh 2O, cryptocrystalline, hardness: 5.5-6.5, specific gravity: 2.65-2.66, refractive index: 1.54-1.55.It is the trees in geological history that undergo geological changes and are finally buried in the strata and undergo the chemical exchange and filling of groundwater, thus these chemicals crystallize and deposit in the woody parts of the trees Preserved the original structure of the tree, thus forming fossilized wood.
The conditions under which trees are preserved as fossils are extremely harsh, and the prerequisite for a tree trunk to become silicified is that its trunk must be buried quickly The chances of a tree becoming a fossil are very small. After the trees are buried by sediment, the solution of ground water rich in siliceous elements dissolves the woody elements and precipitates the siliceous elements carried by the trees into the dissolved pores. If the rates of dissolution and alternation are equal and the molecules are exchanged, the tree's fine structures, such as rings and cell outlines, can be preserved. If the alternating velocity is less than the dissolving velocity, the tree shape is mainly preserved and the tree ring is not clear.
Because of the texture of some wood fossils show jade texture, also known as silicified wood or tree jade. Petrified Wood is a tree that was buried hundreds of millions of years ago for a variety of reasons. In the ground, chemicals such as silicon dioxide, iron sulfide, calcium carbonate and so on around the trunk enter the tree's interior under the action of underground water Replaced the original wood composition, retained the shape of the tree, usually wood fossils have more cracks or gaps, and often in some places wood fossils have been other materials such as agate filled replacement, these are the natural products of long years, not the result of artificial filling, and should not be seen as flaws, but this is the wonder of it.
The fossil tree is the best among the silicified trees in geology. It was born in the Mesozoic period more than 200 million years ago. Because of sudden and violent geological changes, the tree was buried deep in the ground and formed under extremely harsh address conditions It's a rare relic from billions of years ago. Wood fossils set the aura of heaven and earth, the essence of the sun and moon. It is a collection of wood, stone, jade as one of the GEM Jiapin.