Rare Mexican Black Cantera Opal Necklace- All Sterling Silver 🖤

Rare all natural Black Mexican Cantera Opal Necklace. These opals are only found in one place in the world. They originate from the Magdalena region of Jalisco, Mexico. Mexican Cantera opal is a type of fire opal that forms in rhyolite, a volcanic rock. Chain length is 18" and 925 Solid Sterling Silver stamped. Ships within 24 hours of purchase 🖤