After some extensive research, I think I've finally elucidated what your mystery metal is, but I'll need some additional materials to run some tests. If my theory is correct, we may have very well discovered a previously unknown alloy! Here's the list of what we'll need, hurry back!
We've done it, [%name], we have discovered a new alloy of immense strength and resilience! I even managed to improve on the ratios in the nugget you found! I took the liberty of naming it Cinerium - I hope you don't mind. Here's all the information you'll need to replicate the process.