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by isaacg 1062 days ago
In particular, copper smithing predates glassmaking, 10000 years ago versus 4000 years ago
1 comments
tetromino_ 1062 days ago
Copper melts at 1085 C, cast iron at 1200 C, steel at a bit under 1400 C, glass at well over 1400 C.

My guess is that glass was discovered by someone trying to invent steel making.

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hinkley 1062 days ago
Crucible steel.
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