A complex formation consisting of a six pointed star within a ring with several square 'knotwork designs around the outside.   

A complex formation consisting of a six pointed star within a ring with several square 'knotwork designs around the outside.   (photo 2)

A complex formation consisting of a six pointed star within a ring with several square 'knotwork designs around the outside.   (photo 3)

A complex formation consisting of a six pointed star within a ring with several square 'knotwork designs around the outside.   (photo 4)