Cut a Gem — Getting your first grinder running
About
OverviewCut a Gem is a Roblox idle game where you grind geodes into polished gems, sell them to buyers, and reinvest your profits to build a bigger gem-cutting operation.
What is on this page
Contents
Getting your first grinder running
Step
The grinder is the core machine in your operation — it takes raw geodes and polishes them into gems automatically. Once it is placed, it runs on its own, so your only job at the start is to get geodes into it and keep the flow moving.
- Place your grinder set it down in your workspace so it can start processing geodes.
- Add a conveyor belt run a belt from your geodes to the grinder to keep material moving.
- Feed in geodes load geodes into the grinder and let it begin polishing automatically.
Selling gems and understanding purity
TipsBuyers will make offers on your finished gems, and the number they quote depends on how well-polished each gem is. There is no cap on how valuable a gem can become.
- Keep grinding a geode longer to raise its purity and push its sale price higher.
- Check each buyer offer before accepting — take the best one available.
Offline production and idle play
SummaryThe game is designed around idle play. Your machines keep running continuously whether you are online or not.
- Offline grinders your machines keep polishing gems even after you close Roblox.
- Return rewards log back in after any break and collect the gems that built up while you were away.
Scaling up your production line
CheckMore machines running in parallel means more gems polished in the same amount of time.
- Extend your conveyor belts to feed multiple grinders.
- Keep adding grinders with each round of profits.
Redeem codes
WarnThe game distributes codes through its official communications server. This site currently tracks five working codes — use the redeem section on this page to find them. Each code can only be used once per account, and codes can stop working after a certain point.
1MVISITS
100KVISITS
PRETTYGAME
1KLIKES
Glossary
Glossary- Geode
- The raw mineral you feed into a grinder to be polished into a gem.
- Grinder
- The main machine that automatically polishes geodes into finished gems.
- Conveyor belt
- A belt that moves geodes and finished gems around your workspace so your grinders stay supplied.
- Purity
- A measure of how well-polished a gem is — higher purity means a higher sale price.
- Offline production
- The game mechanic that keeps your grinders running and producing gems even while you are logged out.
Common questions
FAQDo my gems keep building up when I close the game?
Yes — your grinders keep running while you are offline, so gems accumulate the whole time you are away.
Is there a maximum value a gem can reach?
No. There is no limit on how valuable a gem can become.
Do I need to spend real money to enjoy the game?
No. Placing grinders, running conveyor belts, and selling gems are all free. Free codes handed out through the official communications server can also give you extra rewards at no cost.
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