[...] this icon represents something that doesn't exist.

The icon/symbol/alert for lightning https://wiki.factorio.com/images/Endangered-by-lightning.png also does not 100% represent how a lightning/electric dischage looks like https://upload.wikimedia.org/wikipedia/commons/1/16/CC_lightning ...

You mean besides the thing you're building on? :P

I tried looking up any images of ammonia-based snowflakes but the closest I could find was this picture of carbon dioxide ones:
11-17-2024, 13-31-40.png
(Source: http://www.exo.net/~pauld/Mars/4snowflakes/martiansnowflakes.html )

But yeah, for ...

Snowflakes don't have pentagonal symmetry. They only have hexagonal symmetry, so this icon represents something that doesn't exist.

I'm aware this is extremely nitpicky but I figured it was better to at least post it instead of grumbling about it forever