From the French for 'a thousand grains', the tiny beads of a milgrain accent can add complexity and detail to a Lab Emerald design, as well as create a vintage or antique look. The birthstone of May, an emerald ring symbolizes the eternally returning spring. The velvety green color of emerald is a perfect match for spring and summer fashions. Black and gold make a beautiful and elegant combination. A black onyx ring is a perfect accessory for any outfit.