I also found an extra vein which not many people seem to know about.
It's about the place where you have the 3 pedestals with the red/blue/dark books, the vein everyone finds is in the back right corner near the pedestals.
The 2nd one is, when facing previous vein, directly behind you at head height.

I had no luck in finding a vein in the high hall cave, so it's highly doubtfull there actualy is one, maybe one of the venom veins had a malachite gem once or they mistook an emerald for a malachite.

Last edited by BobMaster; 18/05/10 04:35 AM.