Greystones
For a +10 weapon, you need 15 Greystone Shards, 6 Greystone Chunks, and 1 Pure Greystone.
- The Armor Spider Archstone is a good destination to farm them. You'll find Rock Worms if you backtrack in the area. Return to the Nexus and go back to the place with the Worms until you have had enough.
- The Pure Greystone is more complicated. You need a pure white world trend in World 2, then get the Dragon Bone Smasher in 2-3, go talk to Scivir in 2-3. He is hidden at the bottom of the area near 2 crystal lizards.