Stunning 925 onyx geometric brooch vintage 80s

This sleek, elegant brooch can be worn in several directions. Gorgeous geometric shape with a large oval, bezel set black onyx cabochon. Marked 925 Mexico TM141, which is the mine of origin. Excellent vintage condition. Perfect for a lapel, closing a cape, anchoring a scarf, pinned to a trench or fedora, plenty of opportunities for creativity. Vintage, from the 1980s. Please see photos for measurements. Shop with confidence! I'm a 5 ⭐️ seller with over 1400 sales. Offers welcome.