One of a Kind Stunning Ring From South Africa 🇿🇦

One of a Kind Stunning Ring From South Africa. I bought this in South Africa about 10 years ago. It's unique and a statement piece. I believe it's sterling silver, though I have no idea what the stone is. Last pic shows a stamp, but I can't get a good enough picture to see clearly. Size is about a 5.5. Used great condition.