These collection items can only be obtained from Buried Treasure.
If completed with 3 other collections (Rare Trilliant Gems, Treasure Hunter Masks, Antique Weapons), you can complete the top-level collection: Master Treasure Hunter.
- A rare red oval gem
- A rare green oval gem
- A rare blue oval gem (possibly the rare piece of the set)
- A rare yellow oval gem
Reward: A medium amount of XP.