How to Cut Quartz Rock Countertop

Quartz countertops have become an increasingly popular option for kitchen and bathroom remodeling projects. Made from engineered stone, quartz is an attractive, durable, and low-maintenance material. However, despite its hardness, quartz can be cut to custom sizes and shapes with the right tools and techniques. Here is a step-by-step guide on how to cut a quartz rock countertop.

Getting Started – What You Need

Before beginning any countertop project, it’s important to gather all the necessary materials and equipment. Here is what you will need to cut a quartz countertop:

  • Quartz countertop slab
  • Tape measure
  • Marker or pencil
  • Straight edge
  • Clamps
  • Wet saw with a diamond blade
  • Eye protection
  • Ear protection
  • Respirator mask
  • Gloves

Ensure you have high-quality safety gear to protect yourself from flying debris and dust while cutting. A standard circular saw cannot cut through quartz – you will need a specialized wet saw with a diamond-tipped blade designed for this material.

Measuring and Marking the Cut Lines

The first step is to carefully measure and mark where you need to make the cuts. Use a tape measure to determine the exact dimensions for the quartz countertop section. Mark the cutting lines with a pencil or marker along a straight edge. Make sure your lines are straight and accurate, as any mistakes will be permanent.

Clamp a straight edge down to keep your lines straight and prevent the quartz from moving during marking. Double check all measurements before marking – measure twice, cut once. Mark along the edges so you can clearly see the cutting lines.

Cutting the Quartz Countertop

Once your cut lines are marked, it’s time to start cutting:

Secure the Slab

Use clamps or weighted objects to fully secure the quartz slab to the saw table to prevent any movement or vibration. Make sure it is flat, level, and firmly in place.

Make a Practice Cut on Scrap Material

To get a feel for the cutting speed and blade pressure, first make a practice cut on a scrap piece of quartz. This will help you get comfortable with the wet saw before cutting your actual countertop slab.

Start Cutting Your Quartz Slab

When you are ready, carefully line up your marked cutting line with the wet saw blade. Keep your hands safely clear of the blade and double check the alignment. Slowly lower the blade into the quartz while spraying water for lubrication and cooling.

Apply even, firm pressure as you cut all the way through the slab while keeping the saw blade aligned along your marked line. Cut slowly and steadily for best results. f the saw blade veers off your line, stop and realign before finishing the cut.

Make Multiple Passes If Needed

If the quartz is especially thick, make multiple gradual passes to cut all the way through instead of forcing it in one pass. Lower the blade slightly further each time until you cut through the full depth. Go slowly to avoid cracks or chips.

Finish All Cuts

Carefully repeat this process to complete all necessary cuts in the quartz slab according to your measurements and layout. Take your time and be precise for best results.

Tips and Precautions

Follow these tips when cutting quartz countertops:

  • Use eye and ear protection for safety
  • Wear a mask to avoid breathing in silica dust
  • Never cut dry – always spray water during the cutting process
  • Check blade depth and clearance before starting
  • Reduce blade speed if you see burning
  • Cut slowly and steadily while maintaining even pressure
  • Make multiple shallow passes for thick slabs
  • Support slab overhangs to prevent cracking
  • Check measurements twice before cutting

Cutting quartz does produce silica dust, so cleanup and containment of the material is important. Make sure you use a wet saw with an integrated water supply to minimize airborne particles.

Finishing the Edges

Once the slab is cut to size, inspect the edges. Use a coarse grit diamond pad or sandpaper to smooth out any small imperfections left by the saw blade. Carefully round and polish the edges and corners for a finished appearance.

Proper finishing and polishing of the cut edges is important to give your quartz countertop a seamless look and feel. Take your time with this step.

Installing the Quartz Countertop

After cutting and polishing, your custom sized quartz slab is ready to be installed! Carefully move it into place and follow best practices for mounting quartz countertops. Use adhesive or brackets designed for quartz installation.

Congratulations, you now have a beautifully cut quartz countertop that will be a durable, low maintenance addition to your kitchen or bath for years to come. With the right tools and techniques, quartz can be precisely cut to custom specifications.

FAQ About Cutting Quartz Countertops

What type of saw do I need to cut quartz?

You will need a wet saw with a diamond blade designed for quartz and stone. A standard circular saw cannot cut through engineered stone. Using a wet saw minimizing dust and keeps the blade cool.

Can I cut quartz with a jigsaw?

It is not recommended to cut quartz slabs with a jigsaw. While you may be able to make minor cuts or notches, a jigsaw cannot effectively cut through a thick quartz countertop. The blade also has a tendency to break or crack the quartz.

How deep should the blade go into the quartz?

Only lower the blade enough to cut through the full depth of the slab. Any deeper risks hitting the table or adjustments mechanisms. Most quartz slabs are 1-2 inches thick. Adjust blade depth accordingly and make multiple passes if needed.

How much water should be used during cutting?

Spray enough water to thoroughly lubricate and cool the blade and quartz during cutting. The quartz should be wet, without excessive splashing of water. Too little water can lead to overheating and cracking.

What speed should I cut quartz at?

Cut quartz at a slow, steady speed to maintain control and avoid cracks. Typical cutting speed is around 4-6 inches per minute. Reduce speed if you notice burning or cracking. Cut slower for thicker slabs.

Can any special tools or bits cut quartz?

A diamond-grit hole saw and drill bits are needed for clean cuts in quartz. Tungsten carbide and cobalt drill bits can also work. Avoid tools not specifically designed for engineered stone.

Is it hard to cut quartz straight?

Cutting quartz straight is easiest using a clamped straightedge guide. Make sure your marked cut line is accurately aligned with the blade before lowering into the slab. Cut slowly while maintaining even pressure.

How do I round-over the cut edges?

Use a handheld wet polisher with diamond abrasive pads, starting with 50 grit and working up to 3000 grit for polished edges. Take care not to chip the corners.


Cutting quartz countertops is an achievable DIY project with the right tools and careful techniques. Always use specialized wet saws and blades designed specifically for engineered stone. Measure precisely, secure the slab, and cut slowly for best results. Finishing and polishing the edges properly gives a seamless custom appearance. With some patience and practice, you can get professional-looking results when cutting quartz yourself. Be sure to use caution and proper safety gear throughout the process.