Citrine engagement rings? Absolutely! Diamonds may be a girl's best friend, but Citrine engagement rings are a unique, original, and a far more affordable choice. November's birthstone, citrine sparkles like honey. Carry the warmth and glow of a golden sunset with you by wearing a beautiful citrine ring. Black and gold make a beautiful and elegant combination. A black onyx ring is a perfect accessory for any outfit. One of the oldest gemstones in history, garnet is the birthstone of January. Garnet rings have been popular since Victorian times, and are treasured for their deep red color.