New vintage eagle turquoise cocktail ring

New vintage eagle turquoise cocktail ring Stunning design! Terrazzo style chips of turquoise and black (?) to form a fierce eagle! Also a famous symbol in Mexico! Rustic industrial design. Great craftsmanship! Heavy! Statement piece! Except… Somehow the band part of the ring is yellow and rough! Many times suppliers sent broken or just items that I didn’t order. So I think this may be an unfinished ring or a mistake that I was stuck with 50 years ago. New vintage c. 1970s. Probably handmade in Mexico. Hallmarks: I can’t make them out. See picture. Genuine turquoise. Stainless steel. Note: this was black so I polished it with toothpaste. It was tested and it’s not silver. Group photos show the variety in the collection