Ukonvasara

Ukonvasara, or Ukonkirves, is the symbol and magical weapon of the Finnish thunder god Ukko, similar to Thor's Mjölnir.

Stone axes, so-called thunderstones (ukonvaaja in Finnish), were found in the ground, especially after drenching rains washed away dirt.

[citation needed] Followers of modern Finnish paganism sometimes carry hammer or axe pendants around their necks, much like Christians sometimes wear crosses.

The related Sanskrit vajra- and its Avestan cognate vazra- are possibly derived from the Proto-Indo-European root *weg'- which means "to be(come) powerful", state Parpola and Carpelan.

[5] Perkūnas is pictured as middle-aged, armed with an axe and arrows, riding a two-wheeled chariot harnessed with goats, like Thor.

Hammer-shaped pendants were carried as protection from the thunder god. A=Finnish Ukonvasara B=Scandinavian Thor's hammer C=Icelandic Thor's hammer
Boat-shaped stone axe/hammer of the Corded Ware culture