**Warning this contains spoilers - if you don't want to read about the ending of the Valley of dying things then don't!!
I got to the end of VODT and my party are in the control room in the major waste depository. We go to press the button, and then it says I don't have the right crystal. what crystal? where do I find that! I've looked back over the walkthrough and I don't think i've missed out on anything...
My special items says:
Runed Stone
Opening Stone
Healing Scepter
Instructions Scrolls
Silver Key
and Brass Key
Obviously i'm s'posed to find a crystal somewhere.... but where!
someone put me out of my misery pleease :-D