The Rose Ryal was a large gold coin struck in James I second coinage (1604-19). It was worth 30 shillings (33 after 1612) and twice the value of the Spur Ryal. Similiar in design to the Tudor sovereign it has a rose on the reverse with the King enthroned on the obverse.

 

                      Rose Ryal of James I

          (courtesy of Lloyd Bennett)