The highest melting point of jade is 1773℃, and the lowest melting point of jade is 1692℃. Jadeite is a jadeite species in jade, which was formed at high pressure and low temperature. Scientists put jade in a high temperature environment and found that it began to melt into glass at about 1000 degrees. At this time, most jadeite crystals are granular and a few are fibrous.

The melting point of jadeite is about 1000 degrees, and the highest temperature in the center of burning cigarette butts can reach 800 degrees. The temperature of erupting magma is between 800 and 1500. In general, there is no such high temperature in life that jadeite can melt.

However, although the melting point of jadeite is high, it should also be protected from high temperature in daily wear. After baking and firing, the internal molecular volume of jadeite will increase, which will make jadeite abnormal, lose its moist water, dry its seeds and lighten its color.

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Hardness is one of the important signs to identify Hetian jade, which refers to the ability of minerals to resist the invasion of external mechanical forces (such as carving, pressing and grinding). ) Mohs hardness commonly used in gemology refers to engraving hardness.

In the jewelry industry, hardness is generally regarded as an important symbol to distinguish gems from jade. The hardness of gemstones is generally above 7 Mohs, and the hardness of jade is generally 4-7 Mohs. Hardness below 4 Mohs is usually called colored stone or carved stone. High hardness and good polishing performance can make jade shine and facilitate long-term storage.

Baidu encyclopedia-Hotan jade