Obsidian is a type of volcanic glass that forms naturally when lava cools. Rainbow obsidian has magnetite nanoparticles between its layers of cooled lava, which creates a unique iridescent look. Some describe it as swirling colours in oil, as the colours change depending on the angle you look at it.
Obsidian is a lava protection stone that absorbs the negative energy from your life and shields you from it. This stone is often used during tough times, as it grounds you to your values. It is a great support stone if you're going through change.
Wearing obsidian as jewelry as well as placing it in your home can help you benefit from its emotional and spiritual properties.