>>530186918
don't act dumb
PGE 1&2 are Canon because they were published with The Elder Scrolls video games
2 is fanfiction and deliberately so, ignore it
Adamantine is also in Lord of Souls as Ur which points out that it was there before Red Mountain since the Direnni weren't around til 1E150 ish
it's also in Before the Ages of Man ingame if you want the tl;dr