The emerald is a handsome green color, which makes it popular as a center stone in rings. Additionally, the gemstone is May's birthstone and is said to have healing properties. This makes them popular set in any type of jewelry. In men's emerald rings, a substantial stone is often accented with diamonds or diamond chips. If your budget is not large enough for a natural emerald ring, consider lab-created versions, which can be considerably lower in price. and below for a selection of both natural and man-made rings.