How to distinguish the genuine and fake pearl

The unique handcrafted jewelry is one kind of gem,which has five kinds of color , they are white, red, yellow and deep color most is not transparent. The pearl and the agate, the quartz, the jade together in ancient times are called as “Four treasures in the tradition of our country
GB code stipulated that “the pearl” is the cultured pearl which refers to, if it is the natural pearl must be indicated that “the natural pearl”, now in the market you are generally cannot buy the natural pearl, because gather the natural pearl must be brave that has life-threatening, now there is few person who will go to the deep sea to gather pearls for money, therefore ,only could have the opportunity in auction you can see the natural pearl . It is very simple to distinguish the true and false pearl ,you can rub two pearls (must make an effort, do not give up) several times will come out the tapioca, as soon as scratch the surface layer powder, the surface will not leave any trace. If it is a fake pearl, it unique handcrafted jewelry only has brushed tapioca in the surface, as soon as two beads are rubbed, either did not have the response,or fall the skin and reveal directly