I see a lot of references to 3.x rules. I thought this was in "Pathfinder RPG"?
That being said:
Golem, Adamantine said wrote:
Made using one of the hardest and most precious substances... The vast amount of adamantine required to build even one of these destructive golems is so significant that most worlds do not have enough resources...
So @Aelryinth, you are arguing that ALL OF THE ADAMANTINE OF A PLANET would not overcome DR/Adamantine?