Mexican Sterling Silver and Purple Amethyst Triple Stacking Ring Size: 9

Vintage triple band ring with appliqué swirls and set with amethyst stones. It is a size 9 and measures 7/8" wide. Rings swivel on a pin that joins them in the is tarnished and not hallmarked. The stones are purple amethyst that have some golden areas which I though might be citrine making these stones ametrine, but I think that it is old, yellowed reinforcement glue on the bottoms of the stones. . Made in Mexico. Nice patina.