Louis Ginzberg 
Geonica [PDF ebook] 
Genizah Studies

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The purpose of the ring is not stated by the Gaon, but it may be assumed that the effigy was suspended from it. The Aramaic word for this ring is mm, the jumper, and the same word is used for stirrup.