here is jewel of harmony options u applie jewel of harmony to an item and use upper or lower fragment to reinforce the harmony option on item (just like jol)
Jewel harmony can be made in kanturu after completing event
Stuff to make jewel of harmony can be made from the 2 goblin in adia
to remove reinforced items its from 1 of the goblin in arena (/move adia)
ur best of asking HalfDead aka vladko on how to make the things in adia what makes harmony jewel he knows more coz he mess around with it :P
Screen shot below on harmony options below: