Uh...nope!
Yep!
You could also find someone with a TIG/GTAW set-up, but this is pretty fiddly work for that, and they would likely burn through the clasp trying to weld it.
In theory, a welded joint is just as strong as the base metal, so laser welding could be quite strong, but it would come down to the skill of the person doing the work.
Cheers, Al
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