Vintage Rare Mexico Copper & Blue Onyx Aztec Mayan Large Pendant Necklace

My grandma bought this gorgeous necklace in Mexico in 1950s - 1960s. It is quite big for a necklace, so you could totally design it into a bag or home decoration (That's my mom's suggestion :D) Vintage Hand Crafted Mexican Copper and Brass Handcrafted Carved Blue Onyx Aztec Mayan Tribal Warrior Mask/Face (I'm not sure if the face is jade) Metal chain Blue Onyx Beads Necklace With Large Pendant Origin mark at the back of the Copper plate "Echo Mexico". Measurements: Coper plate: 2'' x 6'' Chain: 12'' Weighs: 85 grams before packing. Clean and ready to use. Please take a close look at photos for details and condition. Let me know if any questions.