Delicate Feather EarringsDelicate and light weight feather earrings are hand carved from prehistoric woolly mammoth ivory and set with rhodium plated sterling silver french hooks. 2. 75 approximate length. 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 depending upon where the material was buried,