Labrets first appear in Mexico sometime between 3500 and 3350 years ago along the coast of Chiapas in southwestern Mexico. This labret is believed to have been collected in the Central Valley of Mexico where they first appear about 2900 years ago. This labret is made of semi-translucent green Obsidian. It's surface has been polished to a mirror finish. It measures 3/4 of an inch (1.9 cm) wide.