Russian, Star Seal, Flax/Hemp, Dunilovo, Image & Found by Dave8472.
Found in Kent, 12x14mm.
Flat sided seal, one side having traces of a circular border with a vertical line transecting it and containing М.Г.Ф. in large Cyrillic letters. The other side has a five pointed star at the centre with the points blunted and inscription around - С.?УНИЛОВО*
М.Г.Ф. = M.G.F. and С.?УНИЛОВО* = S. ?UNILOVO - possibly an initial and surname but the last O is very unusual for a Slavic name.