Never more popular, the London Topaz halo rings feature a beautiful gemstone surrounded by sparkling diamonds. The birthstone of December, the intense deep blue color of a london blue topaz ring can evoke thoughts of warm Caribbean nights. 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. Black and gold make a beautiful and elegant combination. A black onyx ring is a perfect accessory for any outfit.