We searched the internet for the best granite composite undermount sinks and collected the reviews here.

These are the undermount granite sinks that we think offer the best combination of performance, value, and style.

Granite Composite Sinks Review Summary

Here’s a quick overview of the granite kitchen sinks we cover in this article.

1. Blanco Diamond Silgranit Super Single Bowl

Blanco’s Diamond Super Single Bowl kitchen sinks are made with Silgranit. This material is a proprietary blend of granite sand and a heavy-duty composite binder.

This material offers the beauty and toughness of solid granite at a much more affordable price point. Plus, Silgranit is far easier to clean and maintain than natural stone–Blanco claims “40% greater cleanability” than other materials.

The granite composite used by Blanco is non-porous and highly stain resistant. It’s also unaffected affected by acidic foods (like wine) that can react with some other materials.

Granite composite is also incredibly tough and durable. With a heat resistance of 536° F, you can go straight from your oven or stove into the sink. Many users reviews report years of use without nicks, chips, or scratches.

Key Specs

• Dimensions: 33.5″ x 22″ x 9.5″
• Minimum cabinet size: 36″
• Dual mount design (works as a drop-in or undermount sink)
• Drain not included
• Limited lifetime warranty

Blanco Diamond Super Single Bowl Color Options

2. Kraus Quarza 60/40 Double Bowl

Even though Kraus doesn’t yet have the name recognition of a giant like Blanco, they still produce some of the best granite undermount sinks on the market.

The Kraus Quarza’s elegant, flowing lines are perfect for homeowners seeking a slightly more organic look in their granite kitchen sink.

The Quarza’s 60/40 split bowl design with a low divider combines the benefits of single and double bowl sinks.

The big bowl is great larger dishes like pans and baking sheets. The small bowl serves as a rinse basin or place to stash smaller items like utensils. The low divider makes it easier to transfer items from bowl to bowl–especially useful for large pots full of water.

Key Specs

• Dimensions: 33″ x 22″ x 10.75″
• Minimum cabinet size: 36″
• Dual-mount design (undermount or drop-in installation)
• Drains not included
• Limited lifetime warranty

Kraus Quarza Color Options

3. Elkay Quartz Classic Single Bowl

The Elkay Quartz Classic Single Bowl is a smaller, single bowl version of the quartz composite model covered above.

It offers all the same benefits as its double bowl counterpart in a more compact package. This is a perfect sink for situations where counter space is limited.

One benefit to quartz and granite composites is the relatively low levels of noise. Compared to stainless steel sinks, composite kitchen sinks tend to be much quieter.

Available in a large selection of modern color options.

Key Specs

• Dimensions: 24-5/8″ x 18-1/2″ x 9-1/2″
• Minimum counter size required: 30″
• Dual-mount design (undermount or top-mount installation)
• Drain not included
• Limited lifetime warranty

Elkay Quartz Classic Single Bowl Color Options

4. Elkay Quartz Classic Double Bowl Granite Composite Sink

Like the name implies, the Elkay Quartz Classic Double Bowl is made of a quartz composite rather than a granite composite. Quartz composite and granite composite are more alike than different and have similar levels of durability and ease of maintenance.

The Elkay Quartz Classic features a contemporary double bowl design. It’s ideal for homeowners who like to have separate basins for washing and rinsing.

Like granite composite, quartz is also highly resistant to stains, chips, and scratches.

Quartz has a heat resistance of up to 535° F. This means you can go straight from the stove or oven into your sink without worrying about damage.

The Quartz Classic composite kitchen sink comes in eight modern colors like Bisque, Greystone, and Mocha. Elkay’s color offerings are distinct but understated, so you’ll be sure to find a color that works with any kitchen.

Key Specs

• Dimensions 33″ X 18-1/2″ X 9-1/2″
• Minimum cabinet size: 36″
• Undermount installation
• Drains not included
• Limited lifetime warranty

Elkay Quartz Classic Double Bowl Color Options

5. Blanco Performa Silgranit Cascade

Blanco’s Performa Cascade granite composite undermount sink combines the space of a single bowl sink and the utility of a double bowl.

A small raised ledge drains into the larger basin. This provides the perfect place to rinse fruits and veggies, drain pasta, and clean utensils. It’s a unique concept that many reviewers enjoyed.

Like all of Blanco’s Silgranit sinks, the Performa Cascade composite sink is highly resistant to stains, acidic foods, and heat. The patented material is designed to fight the growth of bacteria and other microbes, making it a very hygienic choice.

Key Specs

• Dimensions: 32″ x 19″ x 10″ (small basin 7.75″ deep)
• Minimum cabinet size required: 36″
• Undermount installation
• Drain not included
• Limited lifetime warranty

Blanco Performa Cascade Color Options

6. Blanco Diamond Silgranit Low Divide Double Bowl

Rounding out the list is yet another innovative design from Blanco.

The Blanco Diamond features a 60/40 basin split and a low divider to make transferring heavier dishes easier.

This sink has all the great features you’d expect from Silgranit, like high resistance to heat and an easy-to-clean finish.

It’s also an acid-resistant sink, so you don’t have to worry about discoloration or reactions with acidic foods.

Key Specs

• Dimensions: 19″ x 32″ x 9.5″
• Minimum cabinet size: 36″
• Undermount installation
• Drains not included
• Limited lifetime warranty

Blanco Diamond Low Divide Color Options

7. Blanco Precis Silgranit Super Single Bowl Granite Composite Sink

The Blanco Super Single Bowl undermount kitchen sink is part of their elegant Precis collection.

This granite composite sink combines classic styling with the utility of a single basin. If you like having lots of room to work, this is one of the best granite composite kitchen sinks around.

Blanco’s proprietary Silgranit granite composite material contains 80% real granite sand mixed with a high-strength binder. Silgranit sinks have the hardness and heat resistance of granite without its drawbacks like chipping, cracking, and staining.

Silgranit is also designed to be quiet, non-porous, and very easy to clean.

As you can probably tell by now, granite composite is one of the best kitchen materials on the market!

Blanco Super Single Bowl Key Specs

• Dimensions: 32″ x 19″ x 9.5″
• Minimum cabinet size: 36″
• Undermount design
• Drain not included
• Limited lifetime warranty