Cut a Gem: Every Gear Item & What It Does

Updated 7 November 2026 · Standard formula, shown below

This article lists every gear item in the game Cut a Gem and explains what each one does. You’ll find the full inventory of tools, from the basic hammer to the advanced diamond saw, with their specific functions and how they affect your gem-cutting process.

Background: The Gear System in Cut a Gem

Cut a Gem is a simulation game where players slice rough gemstones into polished, valuable shapes. The gear system is central to the experience: each tool has a distinct purpose, and choosing the right one determines the quality of your cut, the speed of your work, and the final value of the gem. Unlike many crafting games, gear in Cut a Gem isn’t just about durability or power—it’s about precision and the specific action you’re performing. The game’s progression encourages you to unlock better tools as you earn more from each gem, but even the starting gear has its place in the workflow.

Every Gear Item and Its Function

Here is the complete list of gear items currently available in Cut a Gem, along with what each one does in gameplay:

Hammer – The starting tool. Used for the initial rough break of a gemstone. It splits the stone into smaller pieces but gives no control over the shape. Best for quickly reducing a large rough stone into workable chunks.
Chisel – A precision tool for removing small flakes of stone. It allows you to shape the gem’s outline before polishing. The chisel is slower than the hammer but gives you much finer control over the final silhouette.
Grinding Wheel – Used for shaping the gem’s facets. It smooths the surface and creates the flat planes that catch light. The grinding wheel is essential for moving from a rough shape to a defined cut, but it removes material quickly, so you must be careful not to over-grind.
Polishing Wheel – This tool adds the final shine to a gem. It doesn’t change the shape—only the surface finish. A gem that hasn’t been polished is worth far less, and the polishing wheel is the only way to reach maximum value.
Diamond Saw – An advanced cutting tool that can slice through a gemstone with extreme precision. Unlike the hammer, the saw creates clean, straight cuts, making it ideal for geometric cuts like emerald or princess shapes. It’s slower than the hammer but leaves a much smoother edge.
Measuring Calipers – Not a cutting tool, but a critical piece of gear. It displays the gem’s current dimensions and weight. Using the calipers helps you plan your cuts to avoid removing too much material and reducing the gem’s carat weight.
Magnifying Loupe – A visual aid that zooms in on the gem’s surface. It reveals inclusions (internal flaws) and surface scratches that aren’t visible to the naked eye. This tool is essential for quality control before polishing.

How Gear Affects Gem Value

The gear you use directly impacts the final value of the gem in three ways: cut quality, carat weight, and clarity. The hammer and chisel can cause chips or uneven breaks, which lower the clarity grade. The grinding wheel, if used too aggressively, can remove more material than necessary, reducing the carat weight. The polishing wheel is the only tool that can raise the cut grade from “good” to “excellent,” which multiplies the value significantly. Using the calipers and loupe doesn’t change the gem itself, but they help you avoid costly mistakes. For example, checking the calipers before a cut can prevent you from slicing off a large chunk that would have been a valuable facet.

How to Choose the Right Gear for Each Stage

Choosing the right gear depends on where you are in the gem-cutting process. Here’s a typical workflow:

Rough break: Use the hammer to split the rough stone into a manageable size. Don’t worry about precision here—you just want to expose the interior.
Initial shaping: Switch to the chisel to define the basic outline of the gem. This is where you decide if it will be round, oval, emerald, or another shape.
Faceting: Use the grinding wheel to create the facets. Work slowly and check the calipers frequently to ensure you’re not removing too much.
Inspection: Use the loupe to check for any scratches or inclusions you may have missed. If you see flaws, go back to the grinding wheel to remove them.
Polishing: Finish with the polishing wheel to give the gem its final shine. This step is mandatory—without it, the gem will look dull and sell for much less.

In practice, you’ll often switch between tools multiple times. For example, you might grind a few facets, check with the loupe, then grind a bit more. The diamond saw is a luxury for most players because it’s expensive to unlock, but it’s invaluable for intricate cuts where a single mistake ruins the whole gem.

Common Mistakes and How to Avoid Them

New players often make a few predictable errors with gear:

Over-grinding: Using the grinding wheel for too long can shrink the gem below the minimum size for its intended cut, making it worthless. Always measure with the calipers before and after each grinding pass.
Skipping the loupe: Polishing a gem that still has inclusions or scratches locks in those flaws. It’s better to catch them early and fix them with the grinding wheel.
Using the hammer on small stones: The hammer is only useful for the initial break. Using it on a small, valuable stone will likely shatter it. Switch to the chisel or saw for anything under a certain size.
Ignoring the polishing wheel: Some players think the grinding wheel is enough. It isn’t—a polished gem can be worth twice as much as an unpolished one of the same shape and weight.

Gear Upgrades and Unlocks

As you progress in Cut a Gem, you’ll earn currency that can be used to upgrade your gear. Upgrades typically improve efficiency—for example, a faster grinding wheel or a more durable chisel. While the game doesn’t have a strict tech tree, the diamond saw is usually the last major unlock, and it’s worth saving for because it opens up high-value cuts that are impossible with the hammer and chisel alone. There’s also a “master” version of each tool that can be purchased after completing certain challenges, but these are optional and mostly for players who want to perfect their craft.

Alternative Approaches: Gear vs. Technique

Some players argue that gear matters less than technique. That’s partially true—a skilled player can produce a decent gem with just the hammer and chisel. However, the gear sets a hard ceiling on what’s possible. Without the polishing wheel, you can’t achieve an “excellent” cut grade. Without the diamond saw, you can’t make clean straight lines for a princess cut. So while technique is important, the gear is what allows you to reach the highest tiers of value. A common misconception is that the most expensive gear is always the best choice. In reality, using the diamond saw for every cut is wasteful—it’s slow, and for simple round gems, the grinding wheel does the job just as well.

Frequently Asked Questions

What is the best gear in Cut a Gem?

The diamond saw is generally considered the best cutting tool because it offers the most precision. However, the polishing wheel is arguably the most important gear for maximizing value, since it’s required for the final shine. The “best” gear depends on the stage of the cut you’re in.

Do I need the magnifying loupe?

Yes, if you want to avoid selling flawed gems. The loupe reveals inclusions and scratches that are invisible to the naked eye. Without it, you might polish a gem with a hidden flaw, which permanently lowers its value.

Can I cut a gem without the diamond saw?

Yes, you can. The hammer and chisel are sufficient for basic round or oval cuts. The diamond saw is only necessary for advanced geometric cuts that require perfectly straight edges, like emerald or princess cuts.

How do I get more gear in Cut a Gem?

You unlock new gear by progressing through the game’s levels and earning currency from selling polished gems. The diamond saw is typically the last major unlock, so focus on saving up for it if you want to access high-value cuts.

What happens if I break a gem with the hammer?

If you break a gem, you lose that stone entirely. The hammer is only meant for the initial rough break on large, low-value stones. For anything smaller or more valuable, use the chisel or saw to avoid catastrophic failure.

Is the grinding wheel the same as the polishing wheel?

No. The grinding wheel removes material to shape facets, while the polishing wheel only smooths the surface without changing the shape. You need both tools—grinding first to shape, then polishing to finish.

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