Part 1
Gems are forged with Azure Spirit Stones, an item you get in the
Rear Dungeon. (The Rear Dungeon opens once you pass floor 1000 of
the dungeon.)
You can switch between gear and gems.
Switching tabs changes the type of gem you forge.
Forging repeatedly raises your Forge Lv. The higher your Forge Lv,
the easier it is to forge higher-rank gems. The Forge Lv count is
shared across all gem types.
You can see the detailed rates for each Forge Lv under Drop Rates.
Part 2
Switching tabs changes the type of gem you fuse.
Use the arrows to change the rank of the gem you fuse.
Owned
Gems available to fuse (owned − equipped)
Owned
Part 3
The type of gem each slot takes is fixed.
You cannot equip more than one gem of the same type.
Equipped by this character Owned
Part 4
If the number of gems you want to equip is greater than the number you own
when you press Equip, a screen appears that lets you remove gems
from characters that already have them with one tap.
Removing a gem worn by another character on this screen
equips it automatically.
Tapping any character removes the gem from them
and moves it to the character you have selected.
Selecting a different character changes which character
the gem is removed from.