Cut a Rock Rock Tier List

Rocks are the loot table of Cut a Rock. You break floors, pocket stones, cut them into materials, sell for Cash, and log new results in the Index toward auras. This tier list ranks rock rarities and named targets by progression value: early Cash efficiency, Index importance, and flex / limited status.

For hunt routes and cosmic slang, open Rare Rocks. For pickaxe power that reaches better rooms, open Pickaxe Tier List.

Rarity bands overview

Band	Role	Early tier
Common	Cutter fuel and first Cash	C for flex, A for minute-one income
Uncommon	First real sell spike	S once Copper is online
Rare	Mid boards / deeper rooms	A for Cash and Index
Limited / event	Day-7 and weather targets	S for collection
Nova Prism (0.1%)	Ultra chase on boards	S for Index prestige

Letter grades below assume a normal progression save, not a completed Index whale.

Room boards you should memorize

Room 1 (starter board)

• Common 85%
• Uncommon 15%
• Nova Prism 0.1%

This is the board almost every guide quotes. Stay here only until Power and pickaxes open better rooms -?but never ignore Uncommons while you are stuck here.

Later rooms (community-transcribed examples)

Public board readings for deeper rooms commonly show Common rates falling and Uncommon / Rare rising, while Nova Prism stays a 0.1% headline chase:

• Room 2 style board: roughly 50% Common / 50% Uncommon, Nova Prism 0.1%
• Room 3 style board: roughly 35% Common / 50% Uncommon / 15% Rare, Nova Prism 0.1%

Always read the floor board in your live server after patches. Weather events can temporarily spotlight other stones without rewriting the entire baseline forever.

S-tier rocks and materials

Petalstone (Uncommon) -?early S

Base sells around $2.86K make Petalstone the Uncommon that teaches you why rarity matters. One Petalstone can out-earn several Commons. With Day-1 2x Money active, prioritize Uncommon slots in the backpack.

Nova Prism -?chase S

0.1% on Room boards. Appears in daily Day-7 limited talk alongside Genesis Monolith, Royal Relic, and Sun Scarab. Cutting a Nova Prism is both an Index milestone and a community flex. Do not empty your account’s cutter queue of Commons forever waiting for one -?keep income flowing while you hunt.

Day-7 limited set -?collection S

• Nova Prism
• Genesis Monolith
• Royal Relic
• Sun Scarab

Login streaks beat pure RNG for these. If you miss Day 7, check whether a catch-up claim exists before spending Robux impulsively.

Event weather stones -?timed S

During November 2026–style weather windows, join early, fill Pocket with event stones, cut, and Index them before the timer ends. Timed S overrides normal Common farming for the event’s duration. See Updates.

A-tier rocks and materials

Old Button (~$1.2K)

Strong Common-band material that bridges Seashell-tier sells and Uncommon spikes. Keep it when Pocket is tight only if Uncommons are dry.

Broad Uncommons after Petalstone

Any Uncommon that beats your current Common average belongs in the backpack first. Eyesight upgrades ($1K, $7K) help you preview outcomes so A-tier Uncommons do not get mis-cut expectations.

Rares on deeper boards

When Room boards show a Rare band (about 15% on some Room 3 readings), those stones become A for both Cash and Index. Pair with stronger pickaxes so you are not spending three minutes breaking into a room you cannot clear efficiently.

B-tier rocks and materials

Seashell ($690), Copper ($420), Rust Gear ($530)

Perfect cutter fuel. B for Index prestige, essential for keeping machines busy. A backpack of mixed Commons beats a long walk with a single mid material when Pocket is size 3.

Duplicate Commons after Pocket expands

Once Pocket L2 ($10K) lands, start replacing the worst Common duplicates with Uncommon / Rare targets. Commons fall from A-income to B-filler.

Mid materials without new Index checks

If the Index already owns the material, the stone is mostly Cash. Rank it by sell speed versus cut time -?long cuts on low new-Index value are B at best during money pushes.

C-tier habits (not always C stones)

• Carrying one rock home repeatedly
• Ignoring Uncommon 15% while obsessing only over Nova Prism
• Leaving finished cuts uncollected so “better” rocks never enter the machine
• Hoarding event stones past the weather window without cutting them

The rock might be fine; the habit is C.

Index versus Cash priorities

Cash mode: Uncommon first, fast Commons as filler, sell often, fund Copper and Eyesight.

Index mode: Prefer stones that can roll new materials even if expected Cash is slightly lower. Aura progress needs unique entries, not duplicate Seashells.

Hybrid mode (recommended): Keep cutter busy with Commons, always pocket Uncommons/Rares, and spend one route per session specifically hunting boards for missing Index icons.

How pickaxes change rock tiers

Copper’s 150x multi does not change Room 1 percentages, but it gets you into rooms where Uncommon/Rare weights improve. Infinity Reign does not make Nova Prism common -?0.1% is still 0.1% -?yet it multiplies how many rocks you can roll per hour. More rolls beat superstition.

Power training and anvil passes similarly raise attempts per hour. See Power & Anvils.

Ticket and daily synergy

Ticket Cash from Codes should fund Eyesight so you mis-cut fewer mid rocks. Day-1 money boost turns Petalstone into a rocket. Day-7 limiteds shortcut Prism-tier Index pain. Align login streaks with your collection goals.

Summary

• Commons = fuel (situational A early, B later).
• Uncommons like Petalstone = early S for Cash.
• Rares = A on deeper boards.
• Nova Prism + Day-7 limiteds + event stones = S for Index and prestige.
• Read the live Room board after every Duality Works patch.

Mine for the tier you need today, cut everything that pays for tomorrow’s pickaxe, and log every new material like it matters -?because auras say it does.