Breaking floors

Each floor door has a durability bar. Hit it until it breaks; if it barely moves, you need more Power. Room 5 was reported with a total durability of 6.41M.

Instant Floor Break opens one floor for Robux. The store has 30 versions priced from 10 to 300 Robux in steps of 10, and the in-game Break Now button offers the one that matches the floor you are on. Training gets you there for free.

Reading the rarity panel

Under the durability bar, each room lists its possible rock rarities with a percentage. For example, Room 5 shows Uncommon, Rare, Elite and Nova Prism entries. Each room has its own spread, so use the panel for the room you are actually farming.

The rock you pick up and the material you get after cutting are two separate rolls. A rare rock is a better starting point, but what comes out is decided in the machine.

  1. UncommonRoom 5: 35%
  2. RareRoom 5: 50% · Room 7: 35%
  3. EliteRoom 5: 15% · Room 7: 50%
  4. EpicRoom 7: 15%
  5. Nova PrismRooms 5 and 7: 0.1%
Rarities and percentages on the Room 5 and Room 7 panels, reported by cutarock.wiki from gameplay footage. Nova Prism is also sold as a limited stone; see limited stones.

Rarity by room

RoomRarities shownPercentagesDurability
Room 5UncommonRareEliteNova PrismUncommon 35% · Rare 50% · Elite 15% · Nova Prism 0.1%6.41M
Room 7RareEliteEpicNova PrismRare 35% · Elite 50% · Epic 15% · Nova Prism 0.1%To verify
Other roomsTo verifyTo verifyTo verify
Room 5 and Room 7 reported by cutarock.wiki. The percentages add up to 100.1% as printed in game, so they are copied without rounding. The Rare label in Room 7 was partly hidden in the footage.

Going from Room 5 to Room 7 shifts every rarity up one step: Uncommon disappears, Elite becomes the most common and Epic appears. Gameplay videos show the same pattern all the way down: a new rarity about every two rooms, with Legendary around Room 9 and Ancient by Room 15. The full order is on the rarity list.

The 0.1% entry changes from Nova Prism to Genesis Monolith from about Room 11, as both the BemmyBlock and MicoSoup videos show.

Questions

How do I get rare rocks in Cut a Rock?

Reach deeper floors, whose panels show higher rarities, and check the panel before you farm a room.

Why can I not break the next floor?

Your Power is too low for that door. Train longer on a higher anvil or buy a better pickaxe.

How much does Instant Floor Break cost?

Between 10 and 300 Robux. The Break Now button offers the price for the floor you are currently mining.

What are the odds of a Nova Prism rock?

Reported at 0.1% on the Room 5 and Room 7 panels.

Next guides