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How is jade formed? There are many magical legends in the folks; geologists have always regarded it as a mystery. Some people think that jade and diamonds are formed in the depths of the earth's crust at several thousand degrees of high temperature and under high pressure. Actually, it is not; Geophysicists have done a lot of simulation experiments in the laboratory, and combined with the actual situation of jade deposits found around the world, they believe that jadeite is not formed under high temperature conditions, but at very high pressure under medium-low temperature conditions. Subsequent metamorphosis.
Professor Iwakawa Ichiro of Tohoku University of Japan in the book "Gem" (1983), more specifically pointed out that jade is formed at 10,000 atmospheres and relatively low temperatures (200-300oC). We know that the earth is from the surface to the deep, and the deeper the temperature, the higher the pressure. However, jadeite is crystallized under low temperature and high pressure conditions. Of course, it is impossible to be in a deeper part. So where does the high pressure come from?
This high pressure is due to the squeezing force caused by the movement of the earth's crust. It has been confirmed that all areas with a distribution of jade deposits are areas with strong crustal movement. There is another factor: igneous rock intrusions (medium-basic rocks) containing albite in places where jadeite is found. The chemical composition of albite is NaAlSi3O8, so it can be inferred that the jadeite is formed by the desiliconization of the rock containing sodium feldspar under medium-low temperature and high pressure conditions.
Jade maintenance
Those who wear and collect jadeite should be careful not to collide and drop the jade pieces. Sometimes the surface looks like no damage, but in fact, after the collision, the internal structure of the jade has been damaged, and the dark lines are produced. Jade is very jealous of oily greasy. If it is a high-end goods that preserves value, it is not good to wear it into the kitchen to cook. Jade is also not suitable for close to high temperatures, but not for a long time. Because of this long-term, it is easy to produce physical changes and lose luster, not so fresh.
Jadeite should not be exposed to strong acid solutions, which would destroy the structure and color of the jadeite.
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