CHAIN IS NOT INCLUDED Available in Solid 14K Yellow or White Gold, or Sterling Silver Size Reference: 17mm is the size of a US dime 19mm is the size of a US nickel 25mm is the size of a US quarter Saint Hyacinth, O.P., (Polish: wity Jacek or Jacek Odrow) (b. ca. 1185 in Kamie lski (Ger. Gro Stein) near Opole (Ger. Oppeln), Upper Silesia d. 15 August 1257, in Krakw, Poland of natural causes) was educated in Paris and Bologna. A Doctor of Sacred Studies and a secular priest, he worked to reform womens monasteries in his native Poland.