I mined 2 in half an hour from the Tin, Copper, and Stone nodes just north of Heidel.

Lots of copper nodes in Glutoni Cave, finished the quest in 5 minutes there.

I finish this quest in 30 min, gathering only Copper Ore nodes on Glutoni Cave (close to Keplan) and Coastal Cave (close to Velia)

The path leading directly west out of Keplan, uphill above Glutoni Cave, also contains quite a few copper nodes in the rocky areas, albeit with many chimeras. Don't forget you can also change channels/servers every 15 minutes to re-farm an area if necessary.

Dont know, what i am doing wrong? Mine a ton of copper nodes around ceplan and other locations. Never found any.

Ok , Demoré 10 - 15 minutos en adquirir 1, se recogen sólo del cobre , dejo en el mapa el camino donde abundan muchos minerales de cobre.

Ok, I took 10 - 15 minutes to get 1, collect only copper, this is the road where many copper minerals abound.

Keplan

Peguei apenas os cobres.

http://imgur.com/jNtvOGh