Try this:
1.Cast "replicate" on a crate in LandKing hall.
2.Put a chest in the new crate.
3.Crush the crate and remove the debris(do not move the chest).
4.Cast "replicate" on the chest many times.
(to regain magic points fast, talk to Alaric, tell him "help").
5.Place many chests(about 20) in your characters inventory.
6.Do the same as in step 1.
7. Put all the diamonds that you have inside the crate.
8.Crush the crate.
9.Cast "replicate" on the diamonds until you have enough to fill all the chests.
10.Go to Kosha. Talk to the gemsmith. Ask him about "selling".
11.Sell all your diamonds and put the money inside your now empty chests.
Don`t worry if there isn`t room for all the money: If you don`t move them they`ll be there the next time you visit to Kosha. Look at it as your own personal bank
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12.Talk to Antenor. Tell him "building".
Better now?
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"But which way will the balance swing? To the east or to the west?"
(Omen)