How to Cut Silestone Quartz Countertops

Silestone is a popular brand of engineered quartz countertops known for its durability, low maintenance, and stylish appearance. Though these countertops are designed to be long-lasting, there may come a time when you need to cut or alter them to fit your space or design. Cutting Silestone quartz does require some special tools and techniques to get professional-looking results. Here is a step-by-step guide on how to properly cut Silestone quartz countertops.

What You’ll Need

Cutting Silestone quartz countertops requires having the right tools and safety equipment. Here is what you’ll need:

  • Safety glasses and ear protection – Cutting Silestone produces debris and loud noise so protect your eyes and ears.
  • Face mask – To filter fine particulate matter during cutting.
  • Gloves – Protect your hands from sharp edges and debris.
  • Marking tools – Pencil, marking pen, painters tape to mark the cut line.
  • Straight edge – A straight piece of wood or metal to guide your cut.
  • Circular saw with diamond blade – The blade must be designed to cut stone/quartz.
  • Clamps – To secure the countertop during cutting.
  • Silicon carbide sandpaper – For smoothing cut edges.
  • Shop vacuum – To contain dust from cutting.
  • Mineral oil or polish – Seal and finish cut edges.

Planning the Cuts

Before you start cutting, take careful measurements and plan where you need to make the cuts. Keep these tips in mind:

  • Allow an extra 1/8″ clearance on all measurements for any wiggle room needed during installation.
  • Avoid any seams near heat sources like stoves or edges that will be exposed.
  • Make sure cuts account for any outlets, sinks, or fixtures in the countertop area.
  • Sketch out a diagram of where cuts need to be made. Measure twice and cut once!

Marking the Cut Lines

Once you know where the cuts need to be made, carefully mark the cut lines on the Silestone surface:

  • Use a straight edge as a guide to mark straight lines with a pencil.
  • For curved cuts, use painters tape to create the shape of the curve.
  • Make sure lines are dark and clearly visible.
  • Double check all measurements before marking.

Making the Cuts

When you’re ready to make the cuts, follow these steps:

Set Up

  • Clear the area of any objects or obstructions.
  • Place the Silestone slab on a flat, stable surface like sawhorses or a worktable.
  • Clamp down the slab securely to prevent shifting while cutting.


  • Wear all protective gear – glasses, mask, ear protection.
  • Use a circular saw outfitted with a diamond blade designed for stone.
  • Keep the saw moving steadily through the cut line. Don’t stop mid-cut.
  • Have a shop vac handy to contain debris and dust.
  • Make multiple lighter passes rather than one deep cut if needed.
  • For curved cuts, make relief cuts first then connect between them.

Finishing Touches

  • Sand cut edges smooth with silicon carbide sandpaper.
  • Wipe away debris and dust with a damp cloth.
  • Seal and polish cut edges using mineral oil or a commercial Silestone polish.
  • Inspect cuts to ensure a smooth professional finish.

Installing the Altered Countertops

Once cuts are made, you’ll need to install the altered Silestone pieces into place:

  • Thoroughly clean the underside of the slab and substrate.
  • Apply adhesive specifically designed for quartz countertops.
  • Carefully position cut pieces and apply even pressure.
  • Use wood blocks and clamps if needed to hold pieces in place while adhesive dries.
  • Clean away any excess adhesive squeeze out.
  • Allow 24 hours for adhesive to fully cure before use.

With the right tools and techniques, Silestone quartz countertops can be cut and installed to create a custom look perfect for your space! Just take precautions for safety and careful measurements.

FAQs About Cutting Silestone Quartz

Can I cut Silestone quartz with a circular saw?

Yes, you can cut Silestone with a circular saw outfitted with a diamond blade specifically designed to cut stone and quartz materials. Do not use a woodcutting blade. Go slowly to avoid cracks or chips.

What is the best blade for cutting quartz countertops?

A diamond segmented circular saw blade with small teeth designed for masonry work is ideal for cleanly cutting through engineered quartz slabs. Look for “stone cutting blade” at hardware stores.

How do you cut holes in Silestone quartz?

To cut holes for sinks, faucets, or fixtures, mark the area then use a diamond hole saw kit. Start with a pilot hole then work up to the full diameter needed. Cut slowly and use water to keep the blade cool.

Can any power tool cut quartz?

No, you should only use specialty masonry blades designed for engineered stone. Quartz is too dense for wood or metal blades which can crack or shatter the slab. Stick to diamond circular saws and hole saw kits.

What can I use to smooth edges after cutting Silestone?

Use 100-220 grit silicon carbide sandpaper to gently smooth and polish cut edges of your Silestone countertop. Finish with a Silestone polish or mineral oil to seal and protect the fresh cut edge.


With the proper tools and techniques, DIYers can cut Silestone quartz countertops to achieve custom shapes and sizes needed for their space. Always use specialty diamond blades, take safety precautions, measure carefully, and sand edges for a smooth finish. Patience and care will reward you with professional-looking results installing your altered Silestone countertops.