Rosebud EarringsVintage style prehistoric woolly mammoth ivory rosebud earrings set with either solid 14kt gold or sterling silver post backs. Available in small 12mm or medium 14mm Prehistoric woolly mammoth ivory is found in the cold northern regions of Alaska, Canada, Russia, and Siberia, and may range in age from 10,000 to 200,000 years. Natural colors may include cream, tan, chocolate or caramel brown, blue, or green depending upon where the material was buried,