Ethiopian Opal Marquise Cut Bypass Shank Engagement Ring: This vintage-inspired, handmade engagement ring features lab-created Ethiopian opal stones in a unique two-stone bypass shank design. Made of sterling silver and gold plated with 14k vermeil, this antique-style ring serves as a stunning statement piece. Perfect as an engagement, promise, or wedding ring, it also makes a thoughtful gift for her, highlighting the beauty of birthstones.