Fossil walrus tusk is dug up in the tundra of Alaska. There is strong commercial regulation by the U.S. government regarding its trade, and only tusks excavated by native Alaskan Inuits and found on native lands may be sold. 

This beautiful material is often tens of thousands of years old, and will sometimes be the remains of an Inuit artifact. These artifacts were most frequently ancient fire starters, sled runners, net sinkers, and harpoon catches. If you are lucky enough to buy a carving made from an artifact, you'll own a piece of native American history in addition to a fantastic work of folk art.