Okay so we know that you cannot sell our extra jewels that we come upon at the Bazaar in Old Towne. But we can sell them to Katherine Rockhammer. As such I believe that with a future update that KI should consider allowing Katherine to become a Jewel Bazaar if they will not allow Elik Silverfist to trade Jewels for us.
I know I would hate to see some of my lower just either waste away or not have a purpose anymore since I am higher level, but still do some low level items for some of the adventures.
Just a thought I would love to hear others thoughts on this.