Dragon's Flame, Magical?

[Legate of Amon Lanc]

I hope no one is suggesting here that The One Ring is as easy to melt as the other Rings, that is one of the basic LotR axioms! I don't see any problem with TM's idea that the dragon fire was hot enough to melt normal gold, and therefore, also the Rings of Power, but the One was held together by something else. I could almost quote that from my memory only, but for the sake of further clarity, here is the whole quote:

Originally Posted by Gandalf, Shadow of the Past

Your small fire, of course, would not melt even ordinary gold. This Ring has already passed through it unscathed, and even unheated. Not even the anvils and furnaces of the Dwarves could do that. It has been said that dragon-fire could melt and consume the Rings of Power, but there is not now any dragon left on earth in which the old fire is hot enough; nor was there ever any dragon, not even Ancalagon the Black, who could have harmed the One Ring, the Ruling Ring, for that was made by Sauron himself.

It is clearer than day that the One was held together by something more than just inter-molecular connections.