Cocktail Statement Ring Size 8 - 925

This was my mother in law’s, not sure where she got it but in all my 35 years in their family, I never saw her with it on. It’s not a lightweight cheap ring, it does have some weight to it. The inside is marked 925 Taiwan and there’s some sort of makers mark but I can’t make it out. The stones are black. Size 1.5” L 1” W