Every Viking owned a stone like this - and they traded massive quantities of them too

Sciencenorway.no ^ | September 23, 2022 | Anders Moen Kaste, Ida Irene Bergstrøm, Translated by Nancy Bazilchuk

[SunkenCiv]

Meet Tora, 65 years old. She lived during the Middle Ages
Researchers have created a model of a medieval woman from Trondheim in Norway, based on analysis of her bones.
Ida Irene Bergstrøm
https://sciencenorway.no/archaeology-medieval-history/meet-tora-65-years-old-she-lived-during-the-middle-ages/2108671

Shipwreck discovered at the bottom of Norway’s largest lake – possibly 700 years old
Marine archaeologists believe the ship dates to sometime between 1300 – 1850. It was found at the bottom of the lake Mjøsa, at 410 metres.
Ida Irene Bergstrøm
https://sciencenorway.no/archaeoloy-medieval-history-ships/shipwreck-discovered-at-the-bottom-of-norways-largest-lake-possibly-700-years-old/2110769