Crystals are a hidden collectible item in My Little Blacksmith Shop, which currently serve no purpose other than decoration.
Crystals are mysterious items found throughout the game world.
According to the developer Dasius, the crystals will eventually be a main focal point for the game's story. 
The Four CrystalsEdit
There are four known crystals as of the Alpha 0.0.82 update. They are the Dark Crystal (Fear), Light Crystal (Protection), the red/orange crystal [fire], and the blue crystal [water].
- ↑ https://itch.io/t/57369/suggestion-box