Black-bone chicken jade, also known as "black jade", is a variety that has emerged in the jade market in recent years. It is characterized by black spots, similar to a black-skinned chicken, so it is called "black chicken" "The black-bone jade surface is black, so some people call it "black jade."

The surface of black-bone chicken jade is gray-black to black, the black color is not very uniform, some black jade has gray-green color to varying degrees, and the black-broiled jade is actually a large-scale concept. The jade industry will mainly have black and black. Gray to gray-white jade is called black-bone jade, black-bone jade is the same as other emeralds. The main mineral is jadeite, but its black color is not caused by jadeite minerals, but by some of the jadeite mineral crystals and crystals. A small fine-shaped black impurity inclusion in the gap between the gaps. The black-bred chicken jade is generally between transparent and translucent. The seedlings of most black-broiled jade and jadeite are between the cultivar and the bean species, and the emerald green structure is obvious.

In the thick black-bred jade, you can often see the star-shaped flash, that is, the “green” (fly-winged flash), but some of the good quality black-bred jade species reach the ice. Some scholars have analyzed this black jade under microscope, powder X-ray diffraction, electron probe analysis and laser Raman microprobe, and found that black jade is basically a single mineral rock, that is, more than 98% is jadeite, only There are a small amount of secondary minerals and black impurity minerals. The total amount of the latter is less than 2%. Some scholars believe that the color of black jade chicken jade is caused by internal black impurities. If the amount of black impurity minerals in jadeite is large, jade will show up. Black, that is, black jade, if the black impurity mineral content is very small, appearing in sporadic spots, these black minerals become impurities in the jade, which is what we often call the black dot-like "black spots" in jade or "Flies fly."

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