The particularity of the queen resides in the crown. In the case of my own design, it required the completion of the turning process, followed by some work with a round file while the piece was still mounted on the lathe.
It should be noted that a minimum of four queens should be made, two for each side. This is for when the pawns reach the other side of the board and transform into other pieces, generally into queens. All high-end sets include additional queens for those occasions.
Here are my finished queens: