The Jewel of Open, also called Unlock Jewel (アンロックジュエル Anrokku Jueru?) in the Japanese version, essentially acts like a key that can open blue magically sealed doors in Castlevania: Symphony of the Night and Castlevania Puzzle: Encore of the Night. It can be purchased from the Master Librarian. Richter and Maria do not need to have the Jewel of Open in order to open these sealed doors.
|Item Data: Jewel of Open|
|Image||Name - Game|
|Type / Users||Attributes / Consume||Statistics / Sell||Found||Notes|
|Can open locked blue doors|| Relic (Necklace)|
| Buy: $500 Find: Long Library (Master Librarian's shop)|| Effect: Opens blue doors. Key item required to progress without sequence-breaking.|
|Unlocks the Prison of Eternal Torture.||Leon Belmont|| Find: Pagoda of the Misty Moon 2F|
|Opens blue sealed doors.|| Relic (Necklace)|
| Find: Long Library|| Special: Allows access to new areas.|
- Netflix's Castlevania Season 3, Episode 7, the Jewel of Open is shown among the Belmont's weaponry in the Belmont's Keep (top right).