What is Quartz Countertop Made Out Of?

Quartz countertops have become immensely popular in recent years due to their durability, visual appeal, and easy maintenance. But what exactly are quartz countertops made of? Here is a detailed look at the composition and manufacturing process of quartz countertops.

Composition of Quartz Countertops

Quartz countertops are engineered stone slabs made from a combination of materials:


  • Quartz is a very hard mineral that makes up over 90% of quartz countertops by volume. It is highly abundant in nature and minced into a fine gravel to produce countertops.


  • Epoxy resins are added as a binder to hold the quartz particles together. Resins give flexibility and make the material impervious to moisture.


  • Pigments are added to achieve the desired color and pattern. Popular quartz countertop colors include white, gray, black, brown, blue, green etc.

Other Minerals

  • Small amounts of other semi-precious stones and minerals are sometimes added. For example, flecks of mica or granite can be blended in for visual interest.

The Manufacturing Process

Quartz slabs are made in factories using advanced manufacturing techniques and equipment. Here is an overview of the quartz countertop fabrication process:

1. Mixing the Ingredients

The quartz, resin, and pigments are combined in precise proportions and mixed thoroughly to achieve a homogeneous material. The mixing is done using high-speed mixers.

2. Molding the Slabs

The mixture is poured into molds and compacted under vibration and vacuum. This compacting removes air pockets and creates dense slabs.

3. Curing the Material

The molded slabs are cured at a specific temperature and pressure in special ovens. Curing solidifies the resin and makes the slabs extremely hard.

4. Polishing and Finishing

Once cured, the slabs are polished to achieve the desired finish – either a smooth glossy finish or a textured matte finish. Edges are shaped and polished as well.

5. Quality Control

The slabs are inspected for any defects or irregularities. Only slabs that pass the quality check are approved for shipment to fabricators and installers.

6. Fabrication and Installation

Approved slabs are cut, edged, and installed in homes and buildings by professional fabricators and installers.

Benefits of Quartz Countertops

Understanding what quartz countertops are made of sheds light on their unique properties and advantages:

  • Extremely durable and resilient material that withstands heavy use
  • Non-porous surface that resists staining and etching
  • Easy to clean and maintain
  • Available in a wide range of colors and patterns
  • Does not require regular sealing like natural stone
  • Resists heat, scratches and cracks more than natural stone
  • Routinely outperforms granite, marble, concrete and laminate countertops

In short, quartz offers unparalleled performance, beauty, and convenience – making it the premium countertop material for modern kitchens and bathrooms.

Frequently Asked Questions

Is quartz natural stone?

No, quartz is an engineered stone made from crushed quartz blended with resins and pigments. It is not a purely natural material like granite or marble, but has higher durability and flexibility.

How thick are quartz countertops?

Quartz countertops are usually 1.25 inches thick, but can range from 0.75 to 1.5 inches. Thicker slabs are more durable and suitable for heavily used surfaces.

Can you repair quartz countertops?

Minor damages like scratches can be sanded and polished away. But repairs are limited compared to natural stone; badly damaged slabs may need replacement.

Are quartz countertops seamless?

Quartz slabs are limited to certain sizes, so seams are required in larger countertops. But seams can be tightly bonded to make them barely visible.

How much do quartz countertops cost?

Installed quartz countertops cost $80 to $140 per square foot on average. The exact price depends on the brand, color, and edge treatments. It is more expensive than laminate but cheaper than natural stone.


Quartz countertops offer unbeatable advantages thanks to their engineered composition of quartz, top-quality resins, and custom additives. When manufactured under controlled conditions, quartz forms a robust material that outperforms natural stone for durability, maintenance, and beauty. Understanding the makeup of quartz allows homeowners to appreciate the technology that goes into creating this revolutionary countertop material.