User blog comment:Laquearius/Diomedes vs Sigurd/@comment-2600:1700:F7B1:4D20:1113:2C6F:4924:3FDE-20171229215233/@comment-32516697-20171229220746

Two quick comments:

1. The Byrnie isn't directly stated to be magical, but it was part of Fafnir's hoard, which contained a lot of magical artifacts (a cursed ring, the Helm of Awe, a sword with undefined magical abilities), so one could assume that it is more durable than normal mail. But again, that's just speculation.

2. Gram actually was made by gods; Odin created and gave it to Sigmund. Even before it was broken and reforged, it was capable of cutting through solid stone.

But other than that, that was a great vote! I really hope you join the Wiki someday. I never get tired of reading them.