Changle, Shandong Province is called the City of Gems, because the ancient volcanoes here contain countless sapphires. Sapphire of Changle ancient volcanic group was brought by volcanic movement, and columnar joints formed by magma overflow can also be seen on some rock walls. Volcanic eruption has clear texture and spectacular momentum, just like Wan Jian stabbing into the sky.

In the 1970s and 1980s, before the development of Changle ancient volcano group, nearby villagers came here to pick up sapphires, and some even picked up the original stone weighing 1500 carats. It is no exaggeration to say that sapphires can be picked up at will. Later, the local area began to develop sapphire, and the economy of Changle County began to advance by leaps and bounds. There are very few sapphires here now. Don't mention picking up gems by hand, even if I try to find them, I can't find them. Now the ancient volcano has been protected and become a tourist attraction.

2. Santanghu Township, Xinjiang

The agate beach in Santanghu Township, Xinjiang is covered with more than ten square kilometers of agate. Every time the sun sets, colorful agates shine. At one time, the local people just picked up some beautiful agates, but since the news spread, they have attracted a large number of treasure hunters, some with sacks, some driving cars, and even more, driving excavators to dig for treasures.

Under the crazy picking and digging, the agates on the agate beach were quickly picked up. Today's agate beach has long existed in name only, but people still come here to dig up some agates the size of soybeans with poor appearance and go back as decorations.

3. agate lake

Agate lake, located in Bayin Gobi Desert, Urad Houqi, Bayannur City, Inner Mongolia, covers an area of 6 square kilometers. It was a lake a long time ago, and the agate stone at the bottom of the lake was exposed after it dried up. Like agate beach, you may see a lot, but the locals don't take it seriously. Until the 1980s, some businessmen discovered the agate abundant here, so they called their friends here to dig agate.

The agate in agate lake is disappearing at an extremely fast speed. The local government realized it was too late, because the agate in agate lake was basically hollowed out and the environment was destroyed. It is estimated that the loss is about 2 billion yuan.

Refer to the above?

Baidu encyclopedia-Changle gem

Baidu encyclopedia-agate beach

Baidu Encyclopedia-agate lake