Lore: Origin of Greensteel

[Feralthyrtiaq]

In Dragon Magazine #91 Ed Greenwood outlined 2 metals native to the Nine Hells

One was Tantulhor - Weapons of this metal are slightly brown in color, unbreakable and cut anything they touch except stone.

The second was Arjale - When alloyed with iron, weapons of this metal are greyish-green in color and can be quite pliable.

Perhaps the inspiration for Greensteel came from this article?

[Captain_Wizbang]

Good find, I'd keep looking at later articles where you'll see the reference for the forging and crafting rituals.

[Captain_Wizbang]

Finding the in-depth history of this can be kind of tricky.
As Kieth Baker is the original author of Eberron, you can try to reference his work for a start.

I don't "google" like a lot of people do, so I'll spend some time going through books on this. (Old School)