The jadeite is mainly composed of jadeite in clinopyroxene cluster or other pyroxene minerals (such as chromic jadeite and omphacite). ) and high jadeite molecule (NaAlSi2O6). The mineral composition of jadeite is considered to be the product of high-pressure and low-temperature metamorphism, which has been confirmed by jadeite synthesis experiments. For example, NaAl in jadeite is largely replaced by calcium, magnesium, iron and chromium. , beyond the scope of jadeite composition, become other pyroxenes (such as chromic jadeite, omphacite, diopside, aegirine, etc. ). Jade composed of diopside and aegirine can also be called "pyroxene jade", but it is not jadeite. The article "Black Emerald" published in the third issue of Jewellery Technology in 2000 called black diopside jadeite, which the author thought was inappropriate. For the identification of jadeite jade, the national standard GB/T 16553- 1966 "Jewelry and Jade Identification" has made more accurate provisions. However, the commercial scope of jadeite is larger than that of jadeite (see the author's other article). Because jadeite is a polycrystalline aggregate, the more accurate method to determine whether jadeite and jadeite are mineral components is electron probe image composition analysis, but it is limited by instruments and equipment, and the cost is high. Micro-powder oil immersion method is faster and more convenient to measure. As long as an ordinary polarizing microscope and a few bottles of refractive index are immersed in oil, the samples taken are very small, and even high-grade torus will not affect its beauty and value.