Had to check the lore. Also:

"According to Nordic myth, Ysgramor cried tears of pure ebony as he watched the city Saarthal burn. His son Yngol collected the tears and used them to forge Wuuthrad, his legendary battleaxe.

But ebony still isn't enough to harm ghosts. Except in Skyrim, where everything is, if I'm not mistaken.

Ebony weapons look really cool in Skyrim. I just love the dark look that they impose.

Yeah Ghosts in skyrim aren't immune to weapons unlike Oblivion.

It's one of those small things that I miss.

Me too, especially in Oblivion, but ebony weapons and armor are still the best looking in Skyrim. Altough the helmet looks a bit silly.

I like the look of both the Steel and Dwarven Xbows

I do think a dragonbone would would look pretty sweet though.

You mean like the Gyro Burster upgrade to the yellow gun in Jak 3?