How To Unlock Gemstone Cavern in Blue Prince?

If you're deep into Blue Prince and chasing those juicy permanent upgrades, unlocking the Gemstone Cavern should be high on your list. Why? Because once you do, every future run starts with two extra gems—a massive advantage for drafting early rooms. Unlocking the Gemstone Cavern isn't just a lucky stumble—it’s tied to a specific puzzle path. Here’s how to unlock it:
Step 1: What You NeedTo unlock the Gemstone Cavern, you’ll need to:

• Find the Utility Closet
• Access the Office
• Crack the Utility Panel puzzle

You don’t have to do it all in one go! The game remembers what you’ve unlocked, so take your time.


Step 2: Office First (Trust Us)To get the solution for the Utility Closet puzzle, you need to access the Office. Here's the fast track:

• Find the Security Room.
• Use the magnifying glass on the wall note—it reveals the code: SWANSONG.
• Input that code in the Office Mainframe.

Boom. You now have the color sequence needed for the Utility Panel.
Step 3: Into the Utility ClosetOnce you've drafted the Utility Closet room in a run, open the panel and get ready to solve a color puzzle. You’ll need to match this exact sequence:

• Gray → Blue → Green → White → Red → Purple

Don’t stress if the lights look all over the place—you can fix that with a few smart taps.


Step 4: Solving the Puzzle (Made Simple)Here’s the easy version:

Tap the buttons until all lights are green to start fresh.

Create Purple by turning one light Red and the one next to it Blue. When you tap the Blue, it should merge to Purple.

Follow this pattern down the line until every button matches the required sequence.

Fine-tune individual buttons if needed:

White: Tap until it turns.

Gray: Turn off the light.

Red/Blue/Green: Adjust as you go.

Once the colors match the full sequence, a hidden wall behind the panel will rise. Flip the switch inside.
Pro Tip: Save Time With This ShortcutAlready know the solution? Then, just go straight to the Utility Closet in a future run and input this color sequence manually:

Gray, Blue, Green, White, Red, Purple

Once you get it right, a hidden panel will slide open. Flip the switch inside, and bam—Gemstone Cavern unlocked.

And that’s it—the Gemstone Cavern is now permanently unlocked. Every future run now starts with two extra gems. That means more room drafts, more flexibility, and a serious head start.