Is it normal for Cui Mo yuan card to be inlaid with gaps by hand?

Generally speaking, there will be some patches or irregular ivory and yellowish cotton wadding in Cui Mo, and sometimes there will be some cracks again, which are all practical values that will hurt Cui Mo. A good Cui Mo should avoid absorbent cotton and cracks. If absorbent cotton and cracks appear, they should also be avoided by hand carving or grinding the polished yarn surface.

Cui Mo has a very obvious feature, that is, it looks black and gray in appearance, but it presents attractive green in diffuse light. Therefore, when observed in natural light, the darker the surface color of Cui Mo, the better. Observing under the projected light, dark green and deep blue should be highlighted, and the color is uniform as a whole, without milky white or soft spots of other colors. It must be noted that if the surface color of Cui Mo is not dark gray under natural light, but only oil green and dark green, it cannot be called Cui Mo, but only dark brown oil green jade or water blue jade.