1, poisonous sand

This kind of stone is produced in high-temperature hydrothermal deposits and often coexists with other rare stones. Because it contains sulfur and arsenic, it will give off an unpleasant smell of garlic after heating or knocking. This kind of stone is poisonous, so be sure to wash your hands in time after touching it.

2. Chrysotile wool

This kind of stone is highly carcinogenic. Chrysotile fibers can be divided into smaller particles and fibers, which can be rapidly decomposed in the lungs. Exposure for too long will cause diseases. Workers engaged in chrysotile asbestos mining are prone to occupational diseases.

3. Blue alum

After the blue alum crystal melts and penetrates into the water, it may have fatal effects on animals and plants. Because of this special function, it is also a common ingredient in herbicides and pesticides.

4. galena

Galena is a common sulfide with very fragile structure. Because it contains a variety of toxic substances, long-term contact or inhalation of dust may lead to lead poisoning.

5. orpiment

This kind of ore is mostly found in hydrothermal vents and is formed by arsenic, sulfur and other substances. Long-term exposure will be poisoned by neurotoxins released by it. In many cultures, people rub this ore with arrows to make poison arrows.