Collector Stone:
Do you want to exchange Tower of Insolence' Stone of Memory for Stone of Memory for another floor? That's much easier than creating a new Stones. But keep in mind, you can get only Stone of Memory for a floor below in exchange.
Exchange owned Stone for the Stone of Memory for the 10th floor Exchange owned Stone for the Stone of Memory for the 9th floor Exchange owned Stone for the Stone of Memory for the 8th floor Exchange owned Stone for the Stone of Memory for the 7th floor Exchange owned Stone for the Stone of Memory for the 6th floor Exchange owned Stone for the Stone of Memory for the 5th floor Exchange owned Stone for the Stone of Memory for the 4th floor Exchange owned Stone for the Stone of Memory for the 3rd floor Exchange owned Stone for the Stone of Memory for the 2nd floor