Onyx
Custom Countertop Fabrication & Installation
At Custom Countertop Inc., we offer high-performance cultured marble surfaces from The Onyx Collection, a trusted American brand known for beautiful and durable bathroom solutions. These products — including vanities, shower bases, wall panels, trim, and accessories — are custom-made to your exact specifications and backed by the Onyx “Yes, Guaranteed Forever” warranty.
Whether you’re remodeling a bathroom or starting from scratch, Onyx offers a polished look with easy maintenance and long-term durability.
Onyx FAQs
What is Onyx made of?
Onyx products are made of 63% alumina trihydrate — the same primary ingredient found in Corian and other solid surface materials — and 37% specially developed polyester resin. It’s a non-porous, engineered material designed for everyday performance and long-lasting beauty.
Is Onyx the same as natural stone?
No — Onyx from The Onyx Collection is a cultured marble product, not a natural stone. It mimics the elegant appearance of stone while offering better consistency, lower maintenance, and full customization.
Where is Onyx manufactured?
All Onyx products are proudly made in Kansas, USA, and distributed through a network of dealers across the country.
How do I clean Onyx bathroom surfaces?
Onyx is easy to clean! Use a non-abrasive household cleaner weekly to keep the surface looking new. A surface protectant (like Rain-X®) can help prevent water spots and make cleaning even easier.
Why choose Onyx for your bathroom?
Onyx is a top choice for vanities, shower bases, and wall panels thanks to its custom sizing, variety of color options, long-term durability, and lifetime guarantee. It’s a smart, stylish upgrade for any bathroom.
Let’s create the countertop of your dreams
Looking to get brand new countertops? Look no further! Fill in the form below for a quick estimate and we will get back to you shortly.

Why Choose Custom Countertop Inc.?
With over 40 years of expertise, Custom Countertop Inc. combines cutting-edge technology with true craftsmanship to create countertops that are as durable as they are stunning. Our team — many of whom have been with us for decades — ensures precision fabrication, flawless installation, and a commitment to keeping your project on time, every time. From timeless granite to sleek quartz and bold onyx, we handle every countertop as if it were going in our own home — because quality isn’t an upgrade, it’s our standard.