First, to identify the color Huang Longyu is first of all "color". The colors of Huang Longyu are mainly orange, golden yellow, light yellow, bright red and vermilion. The tones of these colors are the most active and infectious among warm colors. In Huang Longyu jade market, most of the fake jade products are faked or optimized by heating dyeing, colorant dyeing and other methods. If we carefully distinguish them, it is easy to distinguish the differences. Secondly, when observing the light through Huang Longyu, there is orange light transmission at the edge or thin part of the jade material. When illuminated with a flashlight, the halo is wide and suitable for the edge, and the halo can penetrate to 3-6cm. However, it should be noted that the "patina" of some seed materials with skin will affect the judgment of water head, which requires the buyer to have certain experience; Third, the real Huang Longyu is delicate in texture and soft in touch.