Petrified Walrus Tusk (Odobenus rosmarus)
50 - 500 years old
Norwegian Sea, Norway
Approximently 36" length

Walrus tusks, primarily from the species Odobenus rosmarus, have been fossilizing for thousands to millions of years. Fossilized walrus tusks are found in regions like the Bering, Atlantic, and Norwegian Seas, and in the Pacific off the coasts of Siberia and Alaska. The petrified and fossilized tusks are unearthed from ancient hunting camps, village sites, and shorelines. These tusks can range from 500 to 10,000 years old, with some dating back much further to around 17 million years when walruses first appeared.

Historically, Indigenous peoples, particularly the Eskimos, have utilized walrus tusks for practical and artistic purposes. Tusks were carved into tools like ice axes, harpoon tips, and sled runners, as well as for decorative items like jewelry and figurines.
During the Viking Age and into the Early Medieval period, walrus ivory became significant in European trade, especially when elephant ivory was scarce due to Muslim conquests disrupting trade routes. Walrus tusks were traded into northern Europe, where they were used in intricate carvings, notably in Anglo-Saxon and later Gothic art. This trade significantly impacted walrus populations, leading to the animals migration to more northern habitats.

I believe your example, based on coloration and size, is a more recent remain. The example is a section from the skull and a full tusk tooth of the animal. The section appears to be sand-smoothed with pores hole openings in the ivory and bone. No mineralization is apparent from the images provided.

It is important to recognize local, federal, and international laws and prohibitions of sale and shipment of fossils, paleontology, endangered animals and poaching laws.