Having a Hamgyong gem is necessary to complete many other Hamgyong quests.
1.
Slay one of the three Ogre Bosses (Log, Zin-te or Zangze) or a Cave Ogre in
Hamgyong nam-do
to receive a Hamgyong Gem Fragment.
2.
Take the gem fragment to
Nogh.
Nogh requires a 200,000 fee to shape the fragment into a Hamgyong Gem!
Note: You must be Enchanted stats to enter the cave (80k base vita or 40k base mana)
Items you sacrifice for creating Hamgyong Gem:
Hamgyong gem fragment
200,000 coins