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Yes,,,,

If I recall another video on Japanese tamahagane process one of the
keys that required a master was the selection of good steel and the
identification and segregation of the lesser...

Good points about distance....

The secret was a mud sealed clay/ ceramic crucible about the size of a coffee can.
It was filled with iron + carbon + glass (flux) sealed and fired in a charcoal...

I have always wondered if small scale crucible steel was possible.
Clearly it is and near possible for the mortal.

This story about viking swords traces a path from the mid east to
Viking...