Diffusive markings of antique jades are the phenomena caused by the incremental penetration of exterior chemicals after the impact of heat and pressure conditions of the underground environment surrounding the antique jades. Different levels of condensate of colors are usually seen in the jade artifacts. The diffusive markings should not be mistaken as raw jade skin which is saved in the carved object on purpose. The practice of leaving raw skin of jade for the jade carved object has a special name called skillful carving. This practice has a long history in the Chinese jade carving since the Shang Dynasty.
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