ID:             kastor_gem
  Points:         1
  Planet:         Giedi Prime

  Description:
  Find the Task Master Kastor in the Giedian Wilderness. It is said he has
  some tasks for daring adventurers. Supposedly Master Kastor lives in the
  Tower of some sort.

Solution

From gp ap - sw, orni, push button 1 east, buy 4 (boots), west 2n, 14 nw till room with description - There is a small stone tower standing next to the road. open door, enter door, read plaque

Welcome. My name is Kastor and I am an owner of this tower. There are various tasks I would like you to do. If you feel ready to help me simply ask me about a task <ask kastor about task> and I will see what you can do for me. If you think that you have accomplished one of my tasks simply ask me for a reward. In this case… <ask kastor about reward> Good luck.

       ask kastor about task
       go back
       go to mine - 2s,9se,3ne, enter
       e,e, 
       go max south, se etc. (s,sw,se)
       e, go max north (n,nw,ne) until you are inside of the mine. 

This seems to be a very old and unused mine. Floor is covered with sharp rocks, that make walking very difficult. Walls show some signs of mining and some of them, to your surprise seem to be quite recent. It is dark in here and you can't see to far ahead.

One obvious exit: south. You notice a small niche in the wall.

       exa niche, reach into niche, go back to entrance, out
       3sw, 9nw, 4n, 14 nw, open door, enter door, ask kastor about reward