1, according to the different luster and color of gold, pure gold, k gold, real gold and fake gold can be roughly distinguished.

2. Diamonds have high thermal conductivity, so we can observe whether diamonds have temperature. If you put the diamond near your arm or face, can you feel a little warmth? If it's fake, it won't have the heat transfer effect of real diamonds, but it will be cool.

3. Diamond jewelry can be identified by water drop method. Clean and wipe the diamond to ensure that its surface is free of grease. Then, drop water on the diamond. If water drops can stay on a diamond for a long time, it is a real diamond. If the water drops disperse immediately, it may be a diamond imitation.