this piece was hand carved by a Mexica artisan at Teotihuacan pyramids over a rainbow obsidian stone.   the piece depicts an Aztec Dancer-Warrior head with feathers.
RAINBOW OBSIDIAN is used to protect the heart and the whole energy body form bad energies, illness, and bounces back energy arrows from other people. 
obsidian is also a mirror that reflects and shines, a stone used to cut, heal and protect.