Rainbow Obsidian - Polished Slab. Photo is not of actual item,- it is for illustration only - you will receive items that look similar to photo.
A natural volcanic glass.
Chemical Formula: SiO2
Mohs Scale Hardness: 7
Location: Worldwide
Typical Appearance: Typically black, but many variations occur due to the wide variety of minerals it can contain.
This product was added to our catalog on Tuesday 31 May, 2016.