According to Discover Magazine, these discs, composed of the mineral pyrophyllite and dating between the 12th and 13th centuries, may have been navigational tools that helped Vikings chart their ...

Identifying the Medieval Disks The disks, found in several medieval-era archaeological sites in Ukraine, were originally crafted from pyrophyllite, a soft and easy-to-process mineral used for many ...

A recent study published by scholars Olena Veremeychyk and Olga Antowska-Gorączniak analyzes the possible function of pyrophyllite discs found in southern Ukraine. These medieval artifacts may have ...