My system is not decent

Chapter 1909 The Beauty of Muhua Jade

In addition to the complete range of petrified woods in the National Petrified Forest Park, my country is also rich in petrified wood gemstones.

The Shendu Natural Museum once transported a batch of precious wood fossils from Beipiao, Liao Province.

The length of these petrified wood varies from 4 meters to more than 10 meters.

The thickest petrified wood has a diameter of more than one meter, and the thinnest has a diameter of 0.4 meters.

After identification by scientists, the types of this batch of silicified wood are divided into six types: Beihe different wood, wide-pore different wood, and cypress.

Its formation date can be traced back to the late Jurassic period about 1.73 million years ago.

At present, petrified wood can be seen in ancient temples, gardens, parks, and natural museums in the north and south of my country.

In recent years, petrified wood has also become a popular collection for gem collectors.

In Dashanpu, ZG City, Sichuan Province, there are two fossil woods more than 20 meters long.

These two wood fossils are quite special. Although they have gone through hundreds of millions of years, except for the trunk, the branches are also intact.

Shenzhen Fairy Lake Botanical Garden has collected nearly a thousand pieces of petrified wood from all over the world.

The staff erected long petrified wood in the open space, forming a quite spectacular petrified wood forest, which has also become a veritable petrified wood museum.

Precious agate silicified wood has also been discovered in Northwest my country;

In the Museum of Neurology and Nature, in addition to collecting some relatively rare or large petrified wood, there are also several pieces of petrified wood that have been polished and polished, allowing visitors to observe the internal structure of petrified wood more intuitively.

At present, most of the petrified wood in my country comes from Beipiao City, Liao Province.

Beipiao is also famous in the scientific community for its animal and plant fossils.

Fossils of early mammals, reptiles, fish and insects have been found here. .
As early as 2.26 million to 6600 million years ago, Beipiao had a warm climate, lush vegetation, complex types of flora and fauna, and frequent volcanic activities.

As a result, so many animal and plant fossils have been unearthed locally, which has attracted the attention of the paleontological community in this small northern city.

Petrified wood is also called petrified wood, and its main mineral component is silicon dioxide.

Petrified wood was formed [-] million years ago. The stems of ancient trees were buried in the strata due to changes in the earth's crust.

Because it is in a closed and water-deficient environment, wood is not easy to rot.

After the action of the earth's hydrothermal fluids, such as volcanic eruptions, it will be formed.

The process of formation is not simple. Substances such as silica, iron sulfide, and calcium carbonate enter the xylem cells of trees and replace the original woody components before they are formed.

Only in this way can some original forms of trees be preserved, and after more than 1 million years of petrochemical metasomatism, wood fossils have been formed.

Most of the petrified wood is formed by the intrusion of silica, so it is also called silicified wood.

Petrified wood can be subdivided into protein petrified wood, agate petrified wood and ordinary petrified wood.

The main mineral components of protein silicified wood are opal and chalcedony, the Mohs hardness is as high as 7 degrees, and the density can reach 2.2-2.8 grams per cubic centimeter.

So some people also call this kind of silicified wood tree jade, while protein silicified wood and agate silicified wood are rare.

Wood agate, also known as agate silicified wood.

The main component of agate petrified wood is also silica, and its hardness, density and color are exactly the same as natural agate jade.

So it is called agate silicified wood, referred to as wood agate.

The geological community believes that the Eurasian plate collided with the Indian three plates, forming a metamorphic belt from Dehong, Yunnan Province, my country, through Myanmar to India.

Gemstones abound in this metamorphic belt.

This area is also the main producing area of ​​tree jade and wood agate.

Agate petrified wood has red, white, gray, yellow, maroon, brown yellow, green and so on.

Petrified wood is of great ornamental value. Naturally, some people want to use and collect it after seeing it.

Since petrified wood was produced in ancient times, it was born earlier than human beings, and it is pregnant with magical cultural connotations. The mysterious color of ancient plants is accompanied by beautiful annual rings, bark and branches that maintain their original appearance, which symbolize longevity, auspiciousness, and abundance.

Petrified wood is a non-renewable resource, and hard, brightly colored tree petrified jade or wood agate is more attractive to collectors.

What most people see should be the original stone of silicified wood, that is, wood fossils that have not undergone any artificial processing.

It is difficult to find this kind of tree-shaped jade in the market, because only tree-shaped jade with particularly good shape is not used for processing, and particularly good-shaped jade is rare.

Processing is not simply carving, but needs to be polished.

Because the wood fossil itself is the fossil of the tree, the tree has bark, and the bark is whitish and dull in color, which is very unsightly.

Only by peeling off this layer of surface bark and then polishing it can the beauty of woody jade be revealed.

Generally, there is also sandblasting. When the petrified wood jade is polished and polished, due to the limitations of the processing tools, the natural shape of the petrified wood will be completely changed.

In recent years, people have come up with the idea of ​​spraying high-pressure corundum onto the surface of tree jade, spraying off the bark and impurities on the surface, leaving the jade layer in it.

In this way, the petrified wood can maintain its original natural shape, and it can reveal the exquisiteness of jade inside the petrified wood.

However, due to the limitations of the existing sandblasting process, the petrified wood processed by this method must be sprayed with water or wax water to achieve the smoothness of the polishing material.

The types of wood fossil minerals are mainly quartz, followed by chalcedony and opal are very rare.

That's why there are quartz wood fossils, chalcedony wood fossils, and opal wood fossils.

From the analysis of the residual structure of fossil wood, some opal wood fossils have been transformed into quartz wood fossils, and bending cracks under dehydration can still be seen.

The opal wood fossils formed in the Mesozoic Era have been transformed into quartz wood fossils due to the long time, stress, heat and aging.

Only the Cenozoic opal wood fossils are preserved.

Then there is classification according to color, the first is white.

The minerals in this petrified wood have high purity, uniform particle size and single composition.

The most important thing is that the cell residues are light in color and there are very few cell wall residues.

The cell morphology is mainly judged from the cell outline formed by the replacement, filling and accumulation of quartz and chalcedony.

Most of the tree species are non-resinous plants such as metasequoia and ginkgo.

The late dipping effect is weak.White petrified wood is less common.

Then there is the gray silicified wood, which has high mineral purity, uniform particle size, single composition, deep cell residues, and more cell wall residues.

The cell morphology is mainly judged from the cell outline formed by quartz, chalcedony metasomatism, filling, and accumulation, and the obvious cell wall.

Most of the tree species are non-resin-producing plants such as metasequoia and ginkgo, which have a strong dip-dyeing effect in the later stage, and gray wood fossils are common.

The next step is to look better, such as red petrified wood.

Dyeed by the red mineral phase of Fe2O3, the petrified wood appears red.

It is rare for wood fossils to be red as a whole, and most of them are in the form of plaques, mottled or clusters.

When the filling and replacement of wood fossils is chalcedony, it often shows an agate-like appearance.

Then there is the yellow silicified wood, the tree species are mostly resinous plants such as pine and cypress.

(End of this chapter)