"Russian material" mainly includes white jade, green jade, celadon jade, green-white jade, black jade, and sugar jade. It has an oily glass luster, is slightly translucent throughout, and has a hardness between 5.2 to 5.4. In terms of luster, although Russian jade has a glassy luster, it appears slightly more like porcelain and feels dry overall. After polishing, it changes from deep white to a drier, more opaque appearance. When placed on a white cloth, it looks very white, but when held in the hand, it feels dry and rough. In terms of transparency, Russian jade is brighter than Hetian jade, but due to its coarser grain structure, it feels lighter. If worn for a long time, it may turn yellow or black.
Russian jade is commonly known as "E material". It is produced in the Baikal region, far from Mount Kunlun, but still belongs to the typical nephrite system like Hetian jade, especially the white...