Mammoth InfinityHand carved woolly mammoth ivory Infinity. Each is a one of a kind piece due to the natural coloration and patterns present in these prehistoric fossils. Sizing is based on height and may vary slightly from piece to piece. Infinity shapes are measured from top to bottom. Prehistoric woolly mammoth ivory is found in the cold northern regions of Alaska, Canada, Russia, and Siberia. These fossil tusk materials may range in age from 10,000 to 200,000