These earrings are sterling silver and handmade by a Navajo artists. Each piece of jewelry is handcrafted and signed by Native-American artist and all pieces are made from sterling silver and high-grade natural stones. The stones used in these earrings are lapis, charoite and three different shades of turquoise( Sleeping beauty, Royston turquoise and mountain turquoise. The earring comes with a certificate of authenticity with any purchase.