Vintage designer 10k solid gold opal diamonds engagement ring size 6.5

Very pretty vintage dainty 10k solid gold engagement promise ring with twisted rope design, an oval opal cabochon and two natural mined diamonds. The opal is about 6mm*4.3mm. It has varied colors shimmers that didn’t quite show up on camera. Both diamonds are nice and sparkly. The band is about 1.8mm wide. Stamped 10k and maker’s mark that looks like a crown. Excellent vintage condition, cleaned and ready to wear. Props not included. Sold as is. . Other listings: Antique vintage retro designer filigree estate timeless Victorian stackable fine jewelry art nouveau deco bridal sapphire pave wedding prom anniversary rose gold hoop bling ring boho chic natural tear drop cut carat flower lariat eternity stone catbird solitaire valentine coin style gem unisex men women girls stud set square cushion princess ctw party halo round jewel band diamond mom 10k 14k 18k platinum gift micro holiday Christmas birthstone earth tested heavy lightweight weight acid intricate twisted swirl infinity byzantine greek chain link baby sun moon celestial knuckle key butterfly statement heirloom loop double heart paperclip kays 950 delicate dainty wide full tri clarity color ice pinky trillion horizontal marquise rolo 585 750 encrusted crown zales shell sea top bottom cross multi rare nile teal vian gemstones inside out choker yellow love rhodium jewelers wrap stones rope brilliant setting tested bright clean eye pretty tennis case snake