Whale Tail with Jade EarringsHand carved fossil mammoth ivory whale tail earrings are set with rhodium plated sterling silver French hooks and accented with green nephrite jade. A beautiful reminder of your Alaska or Hawaii trip, or a small token of good luck, as whale tails have often been associated with luck and joy. 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.