Gems (Stone) and what they do
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Gem types
There are 3 gem colors, each with many levels, and the higher the level the bigger the bonus:
- Red gem: increases Atk.

- Blue gem: increases Def.

- Yellow gem: increases the ninjutsu (skill) trigger chance.

Sockets
- Each weapon/armor has a random 0 to 4 sockets. Sockets come in 3 colors: red, blue and yellow.
- Each socket takes 1 gem of its own color.
- Filling all the sockets unlocks an extra hidden stat line (more Atk/Def/skill power).
How to socket
Go to the gem house, choose a weapon or armor and tap a socket to inlay or remove a gem. To get higher-level gems, fuse gems (see the "Gem fusion" guide).

