Free Delivery & Free Installation
Keystone Countertop Store
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Keystone Marble & Granite - Countertop Store

Keystone Marble and Granite is one of the top marble and granite suppliers in the area. We offer residential and commercial services in Delaware, Pennsylvania, and Ohio. We have a combined experience of 25 years among our fabricators and installers.

We offer a massive collection of natural stones with more than 250 colors in stock. Besides, as an accredited distributor of the most popular brands of engineered stone, we work with leading brands in the field, like Silestone, Ceasarstone, Hanstone, and LG.

As elegance and functionality do not have to be expensive, we offer competitive pricing and supply one-stop shopping to our customers, as well as a very rapid turnaround time for consultation and installation.
We provide the widest selection of high-performance slabs at our countertop store.

Our Products

We offer widest selection of high-performance countertop surfaces.


Granite Collections

As one of the most beautiful and durable natural stones, granite is a perfect material option for countertops. Check out our offers on granite countertops.

advantages of marble slabs

Marble Collections

The luster and depth of authentic marble are incomparable to any other type of stone material. We provide the finest marble slabs for your kitchen remodeling project. 


Quartz Collections

Quartz is a manufactured countertop material that is excessively durable and chic. Quartz countertop colors have a distinctive shimmer due to the patented process of the manufacturer.


Quartzite Collections

Quartzite countertops' stunning beauty and exceptional durability make them perfect for your unique kitchen design. Once you look at the Keystone Marble and Granite's quartzite collection, you will immediately find more than one alternative that perfectly complements your kitchen design.

Quartz Cloudy Gold

Paragon Exotic Stones

Paragon Exotic Stones excels in crafting superior quartz countertops, skillfully marrying exquisite design with unparalleled durability. Each creation embodies beauty, resilience, and practicality, reflecting the hallmark of Paragon Exotic Stones' craftsmanship.

Why Choose Keystone Marble and Granite?


We have been in business since 2006. Over the decade, we have significantly improved our artistry and have offered meticulous solutions.

Environmentally Friendly

We acknowledge our role in protecting nature and dedicate ourselves to making eco-conscious decisions. We use environmentally friendly materials as well as we recycle waste stones by turning them into brand-new countertops. 


We ensure 100% customer satisfaction with our top-quality products and services to help our customers realize their dream projects. 

Affordable Services

We do not just offer the best services; our estimates are the least expensive that you'll find in the area!

Quick Turnaround

By keeping your busy schedule in mind, a unique "Quick Turnaround" service is provided by our experts.​

Highly-Trained Staff

Our highly-trained staff is insured, licensed, and bonded. All our pros are highly motivated to offer professional services.

The Countertop Sale Process

From an in-home appointment to installation, we plan every single step for you.

Initial Consultation

An initial consultation is scheduled as either an in-home appointment, phone meeting, or video presentation to provide a countertop estimate. Our design consultants will bring an array of samples for our in-home consultations for you to choose from.

Laser Templating

Once your contract is signed, and payment is processed, our customer service team will contact you to schedule the laser templating. 


After the final measure is approved, your countertop moves to production in one of our three countertop fabrication facilities. Our team uses the latest and most advanced equipment in the industry to produce the countertop for your specific space and needs.


Our crews will deliver and install your new countertop based on industry standards and safety protocols. Please refer to our install preparedness video for any questions you may have regarding your countertop installation.

Our Services

Kitchen Countertops and
Bathroom Vanity Tops

Functional, durable, and most importantly, safe: you obtain all these features when you get your kitchen countertops and bathroom vanity tops from Keystone Marble and Granite.

As kitchens are the most high-traffic areas in houses, every element should be as functional as possible. Accordingly, we provide durable, easy-to-maintain, and functional kitchen countertops to ensure high performance in kitchens.  When it comes to bathroom vanity tops, we prioritize offering vanity tops that are resistant to spills and bacterial growth as bathrooms are exposed to humidity and spills. 

Get a Free Quote

It is easy to get a free quote from Keystone Marble and Granite! All you have to do is to provide one of our sales representatives with the dimensions of your kitchen and the stone selections you're interested in from our warehouse. They will then have your free quote done in just a few minutes!

Commercial Projects

We have been growing our reputation with our commercial projects. Thanks to our years of experience in the field and dedication to offering top-quality products, services, and craftsmanship, we always manage to answer customer needs. Prioritizing to ensure utmost satisfaction with our commercial projects, we give great importance to communication, careful analysis of each project requirement, and acting accordingly. 


Request Your Free Estimate

Our Locations​

Keystone Marble and Granite
New Castle, DE Showroom
Keystone Marble and Granite
Horsham, PA Showroom
Keystone Marble and Granite
Lancaster, PA Showroom
Keystone Marble and Granite
Columbus, OH Showroom