Rainbow Obsidian
Rainbow obsidian is a type of naturally occurring glass that forms from lava with a high silica content. Its iridescent colors are caused by the inclusion of the mineral magnetite, which refracts the light to create a rainbow effect.
Rainbow Obsidian: Iridescent Obsidian – Geology In
Rainbow obsidian is a type of natural glass that gets its name from the iridescent sheen that appears on its surface when it is cut and pol…
