There are few such fakes in the market, but there are also some unscrupulous merchants who use stained glass as accessories (the most common ones are small brave pendants, with retail prices ranging from a few to a dozen pieces) and inferior Blackstone as accessories (generally large carvings, characterized by many gray spots/spots/stripes under the light). It is difficult for non-professionals to distinguish between these two kinds of fakes. You can use strong light to see if it is yellow.
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.
Extended data
Obsidian is usually black, but brown, gray and a small amount of red, blue and even green can also be seen. It may also be all monochrome, stripes or spots. Some inclusions give obsidian a metallic luster, while the bubbles or crystals inside produce a "snowflake" effect (that is, snowflake obsidian) or are regarded as a flashing rainbow color.
Black Yao is mostly distributed in areas with frequent volcanic activities, such as Hawaii, Japan and Java Island in Indonesia, and other places such as Iceland, Hungary, Lipari Islands in Italy, the former Soviet Union, Mexico, Ecuador and Guatemala. Dark black monocular diabase is distributed in Arizona and New Mexico, and is called Apache's tears by Indians.
Baidu Encyclopedia-Rainbow Blackstone
Baidu Encyclopedia-Obsidian