How Is Jade Formed Naturally
What Is Jade
Jade is a general term for a class of minerals, usually referred to as jadeite (jade) and nephrite, among which nephrite usually refers to amphibole type flash jade. Jade is very popular in Chinese culture.
How Is Jade Formed
Jadeite is a dense mass of jadeite. It is formed by intertwining countless fine fibrous mineral crystallites. Under the effect of regional metamorphism, the primary albite was decomposed into jadeite and formed; or it is believed that under the compressive torsional stress and low temperature caused by plate collision, the albite first formed a blue amphibole schist with a lower degree of metamorphism, and further metamorphism Made of jadeite.
Strictly speaking, most of the jadeites cannot reach the gem level, so they can only be called rocks. The real jade refers to the sodium pyroxene rock that has reached the gem level, and the pure jadeite rock with the best quality is the most popular collection. Old pit glass kind of emerald. Therefore, the formation of Myanmar's high-quality jadeite primary ore must have gone through the diagenesis and jade stages, and some even experienced the third stage of secondary transformation in the later stage of mineralization.
Is Jade Rock Or Gem
Jadeite rock with stable chemical composition, mineral composition and structural structure forms a fault on the west side of the suture zone of the plate, and is affected by the compression of the Indian plate. Affected by the directional compression and torsion stress caused by squeeze and strike-slip, the jadeite rock formed in the early stage began to undergo dynamic transformation.
In the initial stage of deformation, the jadeite grains undergo plastic deformation, and sub-grains are generated due to the sliding of dislocations, and fine-grained dynamic recrystallization occurs on the sub-grain boundaries, forming mylonite-supermylonite; at the same time, pressure melting causes jadeite The crystal grains grow directionally along the direction of the vertical compressive torsion stress surface, the pores between the crystal grains are well filled, the transparency is greatly improved, and the optimal seed of jade is gradually formed.
Some jade will undergo later transformation. The raw ore is exposed to nature and is eroded by weathering and falls off. The jadeite on the upper part of the ore body has been of good quality under the action of water-rock reaction for a long time. They were first eroded and transported to the bottom of the mountain to accumulate. After abrasion and other weathering, a special weathered crust was formed on the surface of the jadeite. The jadeite is water stone, while the loose structure of jadeite is left in place, that is, the jade mountain stone. Therefore, the later transformation is probably one of the main reasons that the quality of jadeite water stone is generally higher than that of mountain stone.