🟩 Alexandrite
Adds an additional amount of activity to the activity attribute of your sneaker.
The more activity you have — the more income in KCAL you have.
🟥 Ruby
Adds an additional amount of resistance to the resistance attribute of your sneaker.
The more resistance you have — the less the repair of your sneaker costs.
🟨 Limonite
Adds an additional amount of luck to the luck attribute of your sneaker.
The more luck you have — the more chances you have to find a chest during a run.
💎 Diamond
A rare gem that has two random stats. This gem can be acquired by merging two gems.