Level 25/Barbossa ?

[Sarah]

Yes, if you check your treasure page, you should now have unlocked the "rings" treasures. They're to be collected just as any other treasure, get a little gold and something shiny to look at

[Chris]

yea those treasure quests are kinda weird

[BDusel]

From my understanding, after Barbossa (and mind you, I'm only level 31), there is the Treasure Chess Set then as well. Tia Dalma's menagerie is next I believe.