Have a quest to find 2 pieces of Mummonium in Egypt to bribe the company. Quest-giver said to search the sands aroung town. Searched for hours - can't find it (I assume it's a mineral?). Even have collection helper and still no joy. Can anyone throw a clue this way?
You should have some map tags to show you where it is. A good place to look though is take the road that goes behind the Great Pyramid, that will take you through some trees and if you keep going back you get to I'm pretty sure a mine like that that is in Sunset Valley. You should find some back there. Mummonium is really hard to find though because it is rare. Also, check in the relics store, from time to time it is sold there for about $1200 a piece.
You may not get a map tag if there isn't any on the map. It is not something that spawns everyday -- and it seems to spawn in only one place. So you need to camp out at the nearby oasis and wait for it to show up. And find something else to do in the meantime.