this post was submitted on 13 Feb 2026
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[โ€“] Ingiald@feddit.nl 6 points 15 hours ago (1 children)

The sparks are actually coming from the steel and not the stone. Flint is just a very hard and sharp stone that can make tiny bits of steel fly off, heated from the sheer friction.

A different stone that is hard and sharp enough would have the same effect, like pyrite also known as fool's gold. A different metal with, i believe, not enough carbon in it would not work. Thank you for coming to my TED talk.

[โ€“] JackbyDev@programming.dev 5 points 15 hours ago

When I was young I thought I'd need to really know the difference between gold and fool's gold as an adult.