How to Make a Hole in Quartz Countertop

Making holes in quartz countertops for sinks, faucets, soap dispensers, and other fixtures is an important part of installing or updating a kitchen. Quartz is an extremely hard material that requires specialized tools and techniques to cut and drill into without damaging the surrounding surface. Follow this guide to properly make holes in quartz countertops.


Quartz countertops are popular in kitchens and bathrooms because they are made from crushed quartz combined with resins and pigments to create a durable, non-porous surface that resists scratches, stains, and heat. However, quartz is also extremely hard, rating 7 on the Mohs hardness scale, making it difficult to cut and drill into. Improper holes can crack or chip the quartz.

The right tools and careful technique are required when making holes in quartz to avoid damage. Planning accurate measurements and locations is also important prior to cutting the quartz. With patience and the proper precautions, homeowners can safely make holes for sinks, faucets, and other fixtures in a quartz countertop.

Gather the Proper Tools

Making clean, accurate holes in quartz requires using specialized diamond-tipped drill bits and cutting tools. Do not attempt to use standard drill bits – they will become dull and ineffective at cutting through the quartz.

The basic tools you will need include:

  • Diamond-tip hole saw drill bit – Use a specialty quartz hole saw bit for clean sink or fixture holes. Match the size to your intended hole.
  • Diamond-tipped core drill bit – For through holes like faucets, use a diamond core bit the same diameter as the fixture.
  • Electric drill – A variable speed drill allows better control when drilling quartz.
  • Eye protection – Wear protective goggles when operating any power tools.
  • Ear protection – Wear ear plugs or muffs when drilling to protect your hearing.
  • Mask – Wear a mask to avoid breathing in quartz dust.
  • Marker – Use a marker to outline intended holes prior to drilling.
  • Spray bottle with water – The water helps keep the quartz cool while drilling to avoid cracks.
  • Rags – Have some rags available to wipe up excess water and clean the quartz when finished.

Only use high quality diamond drill and core bits designed for quartz and granite. Never apply extreme force or pressure when cutting the quartz. Patiently allow the specialized drill bits to do the work.

Measure and Mark the Holes

Prior to starting to cut, take precise measurements and use a marker to outline where holes should be drilled. Consult your fixture specifications for sizing. Clearly mark the center of each hole location.

When possible, start holes for fixtures or fittings at the back corner of the cutout rather than the front edge. This looks more aesthetically pleasing. Double check all measurements before drilling to avoid misplaced holes. Having an accurate template can help.

Be sure to follow manufacturer recommendations for minimum distances between holes and from counter edges. Leave ample support around cutouts to maintain the integrity of the countertop. Rushing this planning step can lead to unwanted cracks.

Drill the Holes

With your locations marked, tools ready, and safety equipment on, you can start drilling the quartz:

  • Fill the spray bottle with water to keep the bit and quartz surface cool while drilling. The water will help avoid cracking the stone.
  • Start drilling a pilot hole using light pressure at first, allowing the diamond bit to score the surface. Use steadily increasing pressure, keeping the quartz surface wet.
  • Periodically back the bit out to clear away quartz debris and rewet the surface using the spray bottle. Keeping the quartz wet makes cutting easier.
  • For round holes, use a diamond hole saw matched to the size needed. Cut partially through the thickness, then flip to complete from the other side to avoid chipping.
  • For tap holes, use a diamond core bit matched to the outer diameter of the fixture. Drill slowly through the full depth.
  • Go slow with steady pressure. The specialized bits will do the cutting work – forcing or applying excessive pressure can damage the quartz.
  • Use eye protection, ear protection, and a mask throughout the drilling process to protect yourself from debris.

Clean and Finish the Holes

Once the holes are drilled, a few finishing steps will leave you with polished openings ready for your fixtures:

  • Smooth any rough edges around sink or faucet holes with a diamond sanding pad or diamond hole saw.
  • Wash off all quartz dust and debris from the cutting process with water and dry thoroughly.
  • Visually inspect that each hole is cleanly cut, smooth, and accurately placed according to your plans.
  • Test fit all fixtures and make any minor adjustments needed with a diamond abrasive pad.
  • If desired, polish and buff all cut edges and holes with quartz polishing compound to restore the smooth factory finish.

Quartz holes should be cut with care and precision to avoid cracks forming. While cutting quartz countertops takes skill and the right tools, following these guidelines helps ensure successful holes for sinks, faucets, and more. With the proper diamond drill bits and patience, you can achieve beautiful results making openings in quartz.

Frequently Asked Questions

What tools do I need to drill into quartz?

You need diamond-tipped core bits and hole saws designed specifically for cutting quartz and other stone. Standard drill bits will become dull. Variable speed drills allow better control.

Can I make holes in prefabricated quartz countertops?

Yes, you can cut holes in prefab quartz countertops like you would for natural stone or solid surface countertops. Use diamond core bits and make sure to allow adequate support around holes.

What speed should I drill quartz at?

Drill quartz at slow to medium speeds, applying steady light pressure. High speed drilling can crack the stone. Let the diamond bit do the cutting with patience.

How do I get clean edges when drilling quartz?

Use diamond hole saws for round openings like sinks. For taps, core bits give clean results. Smooth any minor chips with a diamond pad. Avoid forcing or applying excess pressure.

Can I drill through quartz with a regular drill bit?

No, regular drill bits won’t effectively cut quartz, which is extremely hard. You must use specialized diamond core and hole saw bits designed for stone drilling.


Making cutouts and holes in quartz countertops is an important skill for installing kitchen sinks, faucets, soap dispensers, and other fixtures. With the proper diamond-tipped specialty drill bits, careful measurements, and patience, holes can be made cleanly. Allowing the tools to do the work avoids cracking the quartz. Precise planning of hole locations also prevents missteps. Investing in the right quartz drilling tools and following best practices will lead to success cutting holes in this durable countertop material.