"Korean material" is Hetian jade produced in Korea, which belongs to Hetian jade in a broad sense. Its main producing area is Chuncheon in the southern part of the Korean Peninsula, which is mostly bluish yellow and brown. The occurrence is mostly mountain material, and there is no seed material. The mineral composition of Korean materials is basically similar to that of Hetian jade, and both are tremolite-based minerals. The hardness and density are close to Hetian jade, but the hardness is slightly smaller, and the hardness is about 5.5. The identification results of Korean materials, like those of China, also belong to Hetian jade. Korean materials and Hetian jade are similar in chemical composition, and both are tremolite-based minerals with similar hardness and density, which fully meet the national standards. Evaluation of testing institutions that have passed national certification. The difference is the difference of its trace components; The composition and structure of minerals are also different. This makes the shape of jade slightly different. Because Korean materials can be identified as "Hetian jade" by appraisal institutions according to the national standards for jewelry and jade appraisal, and the jewelry appraisal certificate is issued, driven by interests, its output has soared year by year, occupying a large part of China's white jade market. In recent years, Hetian jade resources have become increasingly scarce, and the supply is seriously insufficient. However, more and more people like Hetian jade, the supply and demand are seriously unbalanced, and the price of Hetian jade white jade has soared, which has left a huge market space for Korean materials. Due to strong demand, the price of raw materials in South Korea has soared in recent years. But generally speaking, due to many reasons, such as low mining difficulty, large output and not being accepted by jade friends in Korea, the price is relatively low, far lower than Hetian jade in other places (such as Qinghai jade and Russian jade). Blue sea material is relatively transparent, so Korean material is not as transparent as blue sea material, and the polished glass of Korean material is dull, slightly waxy and delicate in structure. Korean material is not as white as Russian material, and its density and hardness are not as good as Russian material. Korean material feels slightly lighter and has a larger light transmission structure. Compared with Hetian jade produced in Xinjiang, Hetian jade in Xinjiang is pure and delicate in texture, with a cloud-like jade flower structure and obvious greasy feeling. Its color is white and slightly light blue, and it is moist and soft. On the other hand, Korean jade is rough and grainy. After polishing, the luster is not soft but slightly waxy. The color is white with grayish yellow or grayish green, and fine needle-like white spots can be seen after careful observation.