Everyone knows the iconic metallic dragons that come in almost every single core monster book, Gold, Silver, Bronze, Copper, Brass. Let’s call those the “core five”
There were some others, like dunno Steel, Iron, Platinum, Electrum, Uranium(?), and what else…
What kinds of metallic dragons other than the “core five” were shown in D&D products?
What were their ecologies and demeanors?
In what worlds did they debut/existed?