What if??

[Tuor of Gondolin]

I'm almost sure that in The Fellowship of The Ring, either when Gandalf throws the Ring to Frodo's fire or when, at Elrond's council they talk about destroying it, someone (probably Gandalf) says that the fire of the dragons might have been able to, but there are none left.

I believe Gandalf observes that not even Ancalagon the Black
could have destroyed the One Ring.

[Farael]

Then I guess I'm wrong =) Still, I'll dobule check