Sice the early 1900's, art-deco has been a prominent design style. In fashion, architecture, and visual design, art-deco is a lasting inspiration to artists off all types. These Onyx designs capture the elements of the art-deco trend and turn you into a work of art. Black and gold make a beautiful and elegant combination. A black onyx ring is a perfect accessory for any outfit. The birthstone of December, the intense deep blue color of a london blue topaz ring can evoke thoughts of warm Caribbean nights.