There are some differences in the quality of obsidian. It is better to have rainbow eyes, monochromatic eyes and bichromatic eyes, which are very beautiful.
Crystal has spirituality and memory, so it needs degaussing before wearing. The degaussing of crystal holes and clusters is better, but the value of these things is much higher than that of obsidian. I suggest that after you get obsidian, you should wash it underwater for two or three minutes to facilitate it to spit out dirt and then bask in the sun. An hour or two is usually enough, and it doesn't matter if it takes a long time, but try to get it back before noon.
Obsidian is a gem with strong adsorption capacity. Wearing it on the right hand can absorb negative energy and diseases in the body, and wearing it on the left hand can prevent the invasion of bad luck and evil spirits. If you wear your right hand, you should purify it regularly, and the method is the same as the degaussing method mentioned above.