Located in the shop you can purchase these books to upgrade your mine
Mine Upgrades[]
Mine Cart: Increases the amount of raw rocks you get
Belt: Increases the speed of all the wash plant parts
Elevator: Spits out fewer rocks when carrying up to the grinder
Grinder: Destroys a lesser amount of ore from the rocks dumped into it
Sifting Table: Lose fewer ore/gemstones through the table
Power Grid: Improves the efficiency of the power gems you use for the wash plant, making everything run just a bit longer
