Obsidian can be processed into handicrafts. In addition, obsidian has the characteristics of glass, and its cross section is shell-shaped and very sharp. Obsidian is one of the gems used in Buddhism to make beads and handicrafts. In China's traditional folk customs, obsidian is usually combined with bravery to make various ornaments and ornaments, which can be worn and placed at home to attract wealth and ward off evil spirits. At present, most obsidian jewelry is produced in Central America and North America, and the national stone of Mexico is obsidian.
Obsidian is a natural colored glass formed by the sudden cooling of magma from volcanic lava. It belongs to amorphous gem, and its main component is silicon dioxide.
In the process of formation, because the temperature around the lava flow drops rapidly and the cooling rate is the fastest, the magma containing silicon dioxide quickly condenses into blocks, and obsidian generally appears around the lava flow or near the seaside at the foot of the volcano.