Hetian jade not only looks oily, but also feels it. Hetian jade looks oily mainly because of the hardness, shape and arrangement of Hetian jade mineral particles. Under normal circumstances, when light is refracted or reflected on the surface of Hetian jade, the characteristics of mineral particles in Hetian jade make the reflected light softer than the irradiated light, and the special luster of Hetian jade itself will form a grease luster weaker than glass luster and stronger than wax luster.

The greasy feeling of Hetian jade is generally affected by three factors, namely fineness, polishing process and playing time. Generally speaking, the finer the mineral particle structure of Hetian jade, the stronger and weaker the sense of grease. Different polishing processes will also make Hetian jade feel different. The longer Hetian jade plays, the stronger the sense of grease will be.

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