At the risk of sounding cliche...
Mithril! All folk desired it. It could be beaten like copper, and polished like glass; and the Dwarves could make of it a metal, light and yet harder than tempered steel. Its beauty was like to that of common silver, but the beauty of mithril did not tarnish or grow dim.
A few days ago, I remembered one important fact from this quote that no modern representation of mithril seems to get right: mithril is
SOFT. Its soft and light and would probably just bend and deform if you tried to hit someone with a weapon made out of it. It was only
after the dwarves processed it, probably alloying it with a brittle metal like iron, that it was harder than steel.
This made me think of what other properties mithril might have instead that would make it useful, and I realized that softness
is a very useful trait for metal to have sometimes, something adamantine definately lacks. Then I thought of both metals' lightness, and realized this can be a liability too. So I came up with a new metal, the most desirable property of which was weight; perfect for bludgeoning weapons. Then I thought of a few more things, each of which occupies a distinct and seperate niche, with little overlap in usefulness.
Then I thought to control the ratios in which they appear in the tubes (I won't be including appearances in in stone layers in the basic mod). I wanted to keep adamantine the most prevelent deep metal, with lodestone and blood gold the least
(this is by no means set in stone). I assume there is an even probability of each given deep stone comprising a given tube, so this would mean making at least two of each ore besides blood gold/lodestone, and even more for adamantine, resulting in a half-dozen or more duplicates.
But then I thought, instead multiple identical ores, why not vary them too? What if I were to include multiple metals on a single rock, instead of just one? Then I could have unique ores too, and the variety my mod adds will be seen in-game more often. I even came up with a few neat little properties the ores themselves could have.
The only other thing I can think of to say is that I'm really glad with some of the names I came up with.