Arrowhead in obsidian. I found it on the coasts of Peru. This piece dates from the time of the Paracas culture. This culture is older than the Incas. It have an average of 2 thousand years old. It have the symbol of Inca’s cross in silver with Andine Blue Opal. The obsidian is black , but it is translucent also. you can choose the color of the string. It is adjustable and waterproof.