Blue Aquamarine and CZ Butterfly Ring Sterling Silver Size 7 Designer Signed

This is a spectacular statement ring with lots of sparkle. It's a vintage piece, featuring three oval-cut pale blue aquamarine gemstones (tested with a Presidium Gem Tester II). They're surrounded by white or clear cubic zirconia stones for added sparkle. The ring has a subtle butterfly design; Each aquamarine stone forms the body of a butterfly, with the cubic zirconia loops creating wings. Each aquamarine gemstone measures 7x5mm. The ring is a size 7. It is stamped "925" (sterling) and "India." There is another maker's mark, two interlocking diamonds, but I'm unable to identify the maker. The ring weighs 3.5g. The ring is in excellent condition. It's been cleaned and sanitized, and it will come in a gift box.