The first one is fake materials, such as glass, plastic, cellophane and so on. But few people do this. The price of ordinary agate is not high

The latter is that the material is agate, but it has been treated the day after tomorrow, such as dyeing, burning, pickling, injecting glue, secondary washing and so on. There are many of these types on the market.

Here, we should focus on the red tourmaline, also known as chicken liver stone. This kind of stone is the associated mineral of agate, which is dry and has no water head. It is mostly used to counterfeit high-priced agates such as Nanhong and Zhanguohong.