Never more popular, the Amethyst halo rings feature a beautiful gemstone surrounded by sparkling diamonds. As the gem of peace and tranquility, amethyst is mesmerizingly beautiful. A durable and affordable gem, an amethyst ring is excellent for every day wear. The birthstone of December, the tranquil azure color of a blue topaz ring can evoke thoughts of warm Caribbean seas on a cold winter day. Black and gold make a beautiful and elegant combination. A black onyx ring is a perfect accessory for any outfit.