Obsidian is a kind of natural glass formed by rapid cooling of volcanic lava, which belongs to impure crystal gem.
Extended data
Identification method:
1, ordinary obsidian without rainbow eyes, is to look at the light under strong light, and the beads are still black without any other reflection. If the pendant is transparent, the light is yellow and dark green.
This obsidian has the largest output, but the lowest market value, so it is generally used for large-scale carving. There are few such fakes on the market, but some unscrupulous merchants use stained glass and inferior Blackstone. It is difficult for non-professionals to tell the difference between these two fakes. You can use strong light to illuminate the light to see if it is yellow or dark green.
2, rainbow eye (light) obsidian, that is, you can see the green/purple/yellow reflection when you look under strong light, or in the sun, or under the flashlight of your mobile phone. Among them, the rare quality surface will have light red-eyed obsidian, light blue-eyed obsidian, red-blue obsidian and other multicolor obsidian, and the quality is very rare. A large number of rough stones can only select a small amount of this quality, so it is rare.
Distribution of origin:
Obsidian is mostly distributed in areas with volcanic activity, such as Hawaii, Japan and Java Island in the United States, as well as Iceland, Hungary, Lipari Islands in Italy, the former Soviet Union, Mexico, Ecuador and Guatemala, and Tibet in China.
Dark black monocular obsidian is distributed in Arizona and New Mexico, and Indians call it "Apache tears".
Most obsidian jewelry is produced in Central America and North America and is the national stone of the United Mexican States.
References:
Baidu Encyclopedia-Obsidian