Wonderstones are special spherical items that can be placed into any windmill to enhance its performance. Each windmill has a socket where you can install a wonderstone, and the stone’s effect applies to all items processed at that windmill.
There are six wonderstones in total. Five can be purchased from Felipe’s Fineries for 140,000 G each, while the Blue Wonderstone can only be obtained as a reward for completing Isaac’s request “Accessory to Love“.
Below is a list of every Wonderstone in the game, along with its general effect.
| Wonderstone | Price | Effect |
|---|---|---|
 Blue Wonderstone |
— | Cuts total processing time in half. |
 Red Wonderstone |
140,000 G | Increases each finished item’s quality by +★0.5. |
 Yellow Wonderstone |
140,000 G | Produces bonus items when batch processing larger batches. |
 Orange Wonderstone |
140,000 G | Increases your max batch size from 10 to 30 items per production line. |
 Green Wonderstone |
140,000 G | Doubles the total number of production lines from 6 to 12. |
 Purple Wonderstone |
140,000 G | Unlocks special crafting recipes at all three windmills. |
How Wonderstones Work
Each windmill has a wonderstone socket at the upper level on the left-hand side.
To install a Wonderstone, select it from your bag while interacting with the socket.
Only a single Wonderstone can be active in each windmill at a time. You can freely swap them out whenever you need a different effect, but you cannot remove a Wonderstone while the windmill is processing items.
