Blue Obsidian is a naturally created glass. These are blue to teal green and were formed from volcanic lava which cooled too quickly for significant crystallization to occur. It is colored by the presence of minerals present during formation. This is a stone/glass that has been associated with spirit fire, genies, and guardian spirits that watch over us. It also has the influences from the mother Goddess, water, mystery. and ancestors. Also used to block negativity, enhance communication skills for presentations or other public speaking, and relaxation/meditation. These are the size of a quarter 3/4"- 1 1/4 and have been polished and tumbled.