What is jade made of and how is it formed?

Jadeite, also known as jadeite jade, jadeite and Burmese jade, is a type of jade. The correct definition of jadeite is a fibrous aggregate composed of pyroxene minerals, mainly jadeite minerals. But jadeite is not the same as jadeite. Jade is a stone polycrystalline aggregate that reaches the jade grade under geological action. It is mainly composed of jadeite or jadeite and sodium sodium chrome pyroxene and sodium calcium pyroxene omphacite.

In fact, people have different views on how jade is formed, which can be divided into four categories. The first view is that jade is the product of desiliconization of residual granite magma that intrudes into ultramafic rocks under high pressure. Although this statement is somewhat different from jadeite, and there are some similarities in composition, there are also some differences. In particular, this substance is produced after desiliconization of granite magma, and most of it does not exist in jade. The second view is that jadeite is formed when primary albite decomposes into jadeite during regional metamorphism; or that under the compressive and torsional stress and low temperature generated by plate collision, albite first forms blueschist schist with a lower degree of metamorphism, and then further metamorphoses into jadeite.

Among them, the second view is more recognized by most people, because most jade is produced in Myanmar, while the output of jade in other regions is very scarce, and the overall quality of the jade produced is also relatively rough. Therefore, the formation of jade is very likely due to the effect of low temperature, so the second point of view is one that many people agree with. Secondly, the third view is that granite veins and light-colored gabbro veins were formed by replacement under the action of hot water solutions with high chemical potential of sodium at a pressure of 12 to 14 kPa.

The fourth view, based on the discovery of three-phase inclusions of water, methane and jadeite in jadeite rock, believes that jade is crystallized from a near-jadeite silicate melt, and that this melt originates from the alkali pyroxene layer that is widely present in the mantle at 300 to 400 km. In fact, people have different speculations about how jade was formed. Among them, the formation of jadeite is an aggregate formed by the crystallization of countless small crystal particles mainly composed of jadeite under geological action, and finally forms jade-grade mineral crystals through weathering.

Secondly, since jadeite is a relatively rare and precious jade, the conditions for its formation are relatively harsh. It is a mineral formed by countless tiny pyroxene minerals, mainly jadeite, during a long geological movement. In addition, jade has many different colors. The color of jade is actually due to the different color-causing ion mineral elements that enter the jade, so the color of jade is also different. For example, the most common green jadeite is mainly produced by chromium ions replacing aluminum ions in jadeite minerals. The content of chromium ions and iron ions directly affects the depth of green. The higher the chromium ion content, the deeper the green. Too much chromium will result in a drier variety of jade.

In addition, there are relatively few places of origin for jadeite. The known places of origin for jadeite are mainly Myanmar, Meiya, Japan, Russia, Guatemala, Xinjiang, China and other places. Among them, 95% of jade is produced in Myanmar. Secondly, except for the jade produced in China, which has better overall quality, the jade produced in other countries is mostly some carving-grade craft raw materials, and rarely reaches the quality of Myanmar jade. Most of the jadeite shown here are gem grade, which means that the overall quality is better and it is a precious jade that can be used for collection. Of course, although Burmese jade is of good quality, since jade is divided into many varieties, the value of Burmese jade varies according to the different varieties.

Among them, jade varieties are divided into glass type, ice type, glutinous type, bean type, etc. The names of jade varieties are very similar to the quality of jade. The glass type, as the name suggests, is as clear and transparent as glass, so the more transparent the jade is, the higher its value is. The ice type is as transparent as ice cubes, but not as transparent as the glass type. Secondly, the transparency of the glutinous type is like glutinous rice soup, and the grains of the bean type are crystallized like beans, so it is called bean type jade.

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