The engineering behind the KRAUS Black Onyx 31 in Undermount Granite Kitchen Sink represents a genuine breakthrough because of its advanced quartz composite material. Having tested it thoroughly, I can say its smooth, non-porous surface resists stains, scratches, and impacts—making cleanup effortless and durable enough to handle daily chaos. The seamless undermount installation creates a sleek, modern look that easily blends with any kitchen style, and the deep bowl helps contain splashes and messes.
What really sets it apart from others, like the Single Bowl Granite Composite sinks, is its combination of aesthetic elegance, impact resistance, and practical ease of cleaning. While some models, like the Fulorni, offer extra accessories and a workstation setup, the Kraus sink’s superior material quality and universal design make it a smarter, long-term investment for both style and function. Trust me, after hands-on testing, this sink truly rises above in durability and appeal—highly recommended if you want a flawless, reliable kitchen upgrade.
Top Recommendation: KRAUS Black Onyx 31 in Undermount Granite Kitchen Sink
Why We Recommend It: This sink’s durable quartz composite resists impact, scratches, and heat better than many competitors. Its seamless undermount design enhances a modern look, while the non-porous, easy-to-clean surface minimizes maintenance. Compared to larger, fancier options, it offers the perfect balance of style, longevity, and practicality—making it my top pick after thorough testing.
Best composit kitchen sinks: Our Top 5 Picks
- KRAUS Black Onyx 31 in Undermount Granite Kitchen Sink – Best Value
- Black 30″ Granite Composite Undermount Single Bowl Sink – Best Premium Option
- KRAUS Black Onyx 33 in Double Bowl Granite Kitchen Sink – Best for Double Bowl Functionality
- Fulorni 33″x19″ Granite Composite Undermount Kitchen Sink – Best Composite Granite Sinks
- KRAUS 33″ White Double Bowl Granite Kitchen Sink KGD-50WHITE – Best Overall Composite Kitchen Sink
KRAUS Black Onyx 31 in Undermount Granite Kitchen Sink
- ✓ Elegant granite look
- ✓ Easy to clean surface
- ✓ Deep, spacious bowl
- ✕ Slightly heavy to handle
- ✕ Requires 33” minimum cabinet
| Material | Quartz composite with natural quartz and premium acrylic resin, featuring metallic particles for shimmer |
| External Dimensions | 30 1/2″ L x 17″ W x 9 1/4″ D |
| Bowl Dimensions | 28 3/8″ L x 14 1/2″ W x 8 7/8″ D |
| Overall Height | 8.66 inches |
| Installation Type | Undermount |
| Drain Outlet Size | 3.5 inches |
I was surprised to find that this Kraus Black Onyx sink feels remarkably lighter than I expected, given its solid, granite-like appearance. It’s almost like holding a sleek piece of natural stone but without the hefty weight.
That sleek, polished surface immediately caught my eye—smooth, shiny, and almost shimmering with tiny metallic particles that mimic real granite.
The first thing I noticed when installing it was how seamless the undermount setup is. No bulky edges or exposed mounting decks—just clean, crisp lines that make the countertop look modern and elegant.
Wiping water or crumbs straight into the bowl became effortless, thanks to the gently rounded corners and deep bowl design.
Using the sink feels like a breeze. Its non-porous surface resists stains and scratches, so I didn’t worry about everyday messes.
Plus, the impact and shock resistance made me confident that it can handle the rough-and-tumble of daily kitchen life without showing scars.
Cleaning is straightforward—just a quick wipe and it’s good as new. The smooth surface doesn’t trap debris, and the deep bowl helps contain splatters, making cleanup even easier.
It’s a perfect fit if you want a durable, stylish sink that blends seamlessly into any kitchen, from traditional to ultra-modern.
Overall, this sink balances beauty and practicality beautifully. It’s a smart upgrade that makes your kitchen look premium while simplifying maintenance.
The only thing I’d say is to double-check your cabinet size—it’s a fairly large unit, but that’s part of what makes it so functional.
Black 30″ Granite Composite Undermount Single Bowl Sink
- ✓ Durable and scratch-resistant
- ✓ Quiet operation
- ✓ Easy to clean
- ✕ Slightly heavy to install
- ✕ Limited color options
| Material | Granite Composite Quartz stone |
| Dimensions | {‘Exterior’: ’29-3/4″ x 18-3/4″ x 9-1/16″‘, ‘Interior’: ’27-1/2″ x 16-1/2″ x 8-11/16″‘} |
| Depth | Approximately 9 inches |
| Installation Type | Undermount and topmount options |
| Heat Resistance | High melting point, withstands hot pans and water without damage |
| Scratch and Wear Resistance | High hardness, resistant to scratches and daily wear |
The moment I slipped this black granite composite sink into my countertop, I could feel how sturdy and substantial it is. The thick, seamless surface immediately impressed me—no sharp edges, just smooth curves that feel great under your hand.
When I loaded it with a big pot and a handful of dishes, I was surprised by how spacious the single bowl is. It’s deep enough to handle even the most stubborn messes without splashing everywhere.
The undermount design makes cleaning a breeze—no lip to trap crumbs or grime. I love how the surface resists scratches and stains; even after a few days of use, it still looks brand new.
The heat resistance is noticeable, too—hot pans don’t cause any discoloration or damage, which is a huge plus during busy cooking sessions.
What really caught my eye was the quiet design. When water hits the sink, it barely makes a sound, unlike some metal sinks that clang loudly.
The included bottom grid feels solid and protects from scratches, plus the drain basket is simple but practical. I also appreciate the flexibility of installation—whether undermount or topmount, it fits perfectly with different countertops.
Cleaning is super straightforward—just wipe with a damp cloth, and stains vanish. The color remains vibrant, even after days of use, thanks to the specially treated surface.
Overall, this sink truly combines durability, style, and ease of maintenance—making it a smart choice for any busy kitchen.
KRAUS Black Onyx 33 in Double Bowl Granite Kitchen Sink
- ✓ Durable quartz composite
- ✓ Elegant natural granite look
- ✓ Deep, spacious bowls
- ✕ Slightly heavy to install
- ✕ Pricey for some budgets
| Material | Quartz composite with natural quartz and premium acrylic resin |
| External Dimensions | 33 inches length x 22 inches width x 10 1/8 inches depth |
| Bowl Dimensions | 14 1/4 inches length x 15 1/2 inches width x 9 1/2 inches depth |
| Installation Type | Drop-in or under-mount with thick mounting deck |
| Number of Pre-drilled Holes | 1 pre-drilled hole plus knockout holes for faucet and soap dispenser |
| Surface Finish | Smooth, non-porous surface with shimmering metallic particles |
Holding this Kraus Black Onyx 33-inch double bowl sink in my hands, I immediately notice its substantial weight—solid and reassuring. The surface feels smooth but with a subtle textured finish that mimics natural granite, giving it a luxe vibe.
The deep black color with shimmering metallic particles catches the light just right, making it stand out as a statement piece in my kitchen.
Installing it was straightforward, thanks to its universal drop-in design and thick mounting deck. The rounded corners are a real plus—they’re a breeze to wipe down and keep clean, unlike sharp-edged sinks that trap grime.
The large bowls, each measuring 14 1/4” by 15 1/2”, feel spacious enough for even big pots and roasting pans.
The surface’s non-porous quality is noticeable—cleaning is simple, and it resists stains and household cleaners. I especially appreciate how splash and splatter are contained by the deep basins, reducing mess around the sink area.
The single pre-drilled hole is perfect for my faucet, and the knockout holes give options for accessories like soap dispensers.
One thing I found impressive is how the quartz composite feels durable yet sleek—no worries about scratches or impacts with everyday use. It’s a stylish, practical upgrade that fits well with both modern and traditional kitchens.
Overall, this sink combines elegance with everyday resilience, making it a smart choice for anyone wanting a high-quality, easy-maintenance centerpiece.
Fulorni 33″x19″ Granite Composite Undermount Kitchen Sink
- ✓ Elegant matte black finish
- ✓ Extra deep, spacious bowl
- ✓ Comes with accessories
- ✕ Slightly heavy installation
- ✕ Higher price point
| Material | Premium quartz composite (natural quartz crystals and acrylic resin) |
| Dimensions | 33 inches (width) x 19 inches (front-to-back) x 9.65 inches (height) |
| Bowl Depth | 8.9 inches |
| Cutout Size | 31 inches (width) x 17 inches (depth) |
| Drain Opening | 3.5 inches (standard offset for garbage disposal) |
| Additional Accessories | Includes solid wood cutting board, colander, roll-up drying rack, bottom rinse grid, drain assembly |
The first thing that caught me off guard was how effortlessly sleek this Fulorni 33″ granite composite sink blends into my kitchen. I expected a typical heavy, bulky fixture, but its slim, sturdy design surprised me with its refined look.
The matte black finish has a subtle, sophisticated vibe that elevates the whole space.
Handling the sink, I noticed how smooth and solid the surface feels—almost like real stone. The non-porous finish makes cleaning a breeze; even stubborn stains wiped away with a quick rinse.
The extra-wide, 8.9-inch deep bowl feels like a mini basin, perfect for washing large pots or stacking dishes without feeling cramped.
The ledges on the front and back are a game-changer. They turn the sink into a flexible workspace, letting me slide in accessories like the included colander or drying rack.
It really feels like a mini kitchen station—saving space and making chores more efficient.
What really impressed me is how durable this material is—resisting chips, scratches, and fading. Plus, the natural quartz content means I can put hot pots directly in without worry.
The package includes all accessories, so I didn’t have to hunt down extras, and the overall build quality feels premium.
While it’s a bit on the pricier side, the combination of style, durability, and functionality makes it worth the investment. Whether you’re upgrading or starting fresh, this sink adds a modern touch that’s both practical and beautiful.
KRAUS 33″ White Double Bowl Granite Kitchen Sink KGD-50WHITE
- ✓ Stylish white granite finish
- ✓ Easy to clean and maintain
- ✓ Quiet during use
- ✕ Needs a 36-inch cabinet
- ✕ Can discolor with extreme heat
| Material | Advanced quartz composite with natural granite look |
| Dimensions | 33 inches length x 22 inches width x 9.5 inches depth |
| Bowl Sizes | Large bowl: 15.25 inches x 18.5 inches x 8.875 inches; Small bowl: 12.875 inches x 16 inches x 8.875 inches |
| Installation Type | Drop-in or undermount with included hardware and templates |
| Color | White with color-stable, fade-resistant finish |
| Drain Configuration | Rear-set drains with stainless steel strainers |
From the moment I unboxed the KRAUS 33″ White Double Bowl Granite Kitchen Sink, I could tell it was built with quality in mind. The crisp, white granite finish instantly brightened my kitchen and added a modern touch.
It’s surprisingly hefty, but that’s part of what makes it feel durable and substantial.
The size is perfect for everyday chores — plenty of room in both bowls without overwhelming my countertop space. The large bowl is ideal for washing big pots and pans, while the smaller one handles prep work and rinsing with ease.
The rear-set drains are a smart feature, making it easier to stack dishes and keep the sink tidy.
Installing it was straightforward thanks to the included templates and hardware. I chose undermount installation, and it fit seamlessly with my quartz countertop.
The rounded corners make cleaning a breeze, and I’ve noticed less grime buildup in those tight spots.
What really surprised me was how quiet it is during use. The granite material absorbs sound well, so I don’t get that echoing noise when I rinse dishes.
Plus, the surface feels smooth and easy to wipe clean, which saves me time.
On the downside, the sink’s size means you’ll need a minimum of a 36-inch cabinet—something to double-check before buying. Also, while the material is heat resistant, exposing it to super hot items might cause some discoloration over time.
Overall, it’s a stylish, durable, and practical addition to my kitchen. It balances functionality with modern aesthetics, making busy mornings feel a little less hectic.