People used to believe that narwhal tusks were unicorn horns

Narwhal tusks were once hunted and sold to the wealthy as "unicorn horns" because it was thought that they might counteract poison. Even Mary Queen of Scotts had a personal tusk worth £10,000 in the 16th century to shield her from Queen Elizabeth I.

Additionally, unicorn horns were frequently used in jewelry since it was believed that they might prevent disease. The Imperial Crown Jewels of Austria were made out of a scepter fashioned from a narwhal's tusk surrounded by rubies, sapphires, and pearls, while the Danish Royal Throne used for coronations between 1671 and 1840 was created out of ivory and narwhal tusks.

The narwhal still piques people's attention today, and one of the most intriguing aspects of these animals is their tusk.