It is said that there are black gems in Chishui River. The story goes like this: A long time ago, there was a very poor village. Because the land is barren, crops can't grow. The villagers are very upset and don't know how to earn more money. There is a Chishui River near the village, which flows around the village. No one knows where its source is, where it flows, and how many years it has been like this.

There is an old man with a long white beard in the village, who is the oldest person in the village. He often said that according to predecessors, Chishui River was formed by the tears she shed when she was in the Goddess Chang'e flying to the moon, and she left a necklace. Over the years, the necklace was scattered all over the floor and turned into a priceless gem with a black light.

Definition of jewelry

There are broad sense and narrow sense. Jewelry in a narrow sense refers to jade products. Jewelry in a broad sense should include gold and silver jewelry, handicrafts or other valuable treasures made of natural materials, minerals, rocks and organisms. Therefore, there was a saying of gold and silver jewelry in ancient times, which distinguished gold and silver from jewelry.

With the development of social economy, the concept of jewelry should be extended to include gold, silver and jewelry besides natural gems and artificial products. The industries dealing in these commodities are collectively called jewelry industry. The scope of jewelry is far greater than the broad concept of gem. Gems in a broad sense generally refer to those raw materials suitable for polishing or carving into jewelry or handicrafts.