Rainbow Obsidian is a variety of obsidian (natural volcanic glass) that displays colorful iridescent bands when light hits it at the right angle. At first glance it often appears black, but under bright light hidden layers of color can emerge.
The colorful bands are created by:
Microscopic inclusions and structures within the glass
Light interference and reflection
Thin layers formed during cooling of the lava
Depending on the specimen, you may see:
Green
Purple
Gold
Blue
Red
Multicolored rainbow bands
In crystal traditions, Rainbow Obsidian is often associated with:
