Ukko's axe, or in finnish "Ukon kirves". This is the symbol of finnish god of thunder, Ukko. Ukko meaning "old man". Ukko is also reference to the word "Ukkonen" meaning "Thunderstorm".
As the rest of the nords had Thor, we had Ukko. Also unlike Thors hammer, Ukko had an axe, the necklace being on the shape of axes blade. Axe was the most important tool we had and has so much cultural value to us, so ofcourse our main god would field one.
This symbol protects its wearer from the natural elements, as thunderstorms and blizzards are the most dangerous ones we have here.
Keeping with the theme, all of my necklaces have the same kind of leather cord. Its made by hand from finnish elk leather. It is durable and nice to wear.
https://primordialfireforge.etsy.com