The screwed mineral in "Metaphorical Fantasy: ReFantazio" is a special prop that is very important at certain times in the game. If you want to get this screwed mineral, you can explore the Man-Eating Cave during the day on July 14th. , then in Man-Eating Cave 01/01, on the middle level with the relics, just open the relic treasure chest.
How to get minerals with screws in metaphorical fantasy
On July 14th, during the day, explore the Man-Eating Cave, and then in the Man-Eating Cave 01/01, there is a middle layer with relics, and a relic treasure chest 1 with a hole drilled in the middle. Inside is a mineral with screws.