Stunning Faux Aquamarine crystal square cut stone in Goldtone setting - accents

Beautiful square cut faux aquamarine stone in a goldtone setting. There are no markings, it attaches to a magnet so not real. But - great piece to wear while on vacation (no fear of losing) or even for glamorous everyday wear. Vintage from a family members collection from the 50’s-60’s. Appears to be a size 9