Granite and Quartz Countertops New Castle DE

  • All In-House Installers
  • 2 – Year Worksmanship Warranty
  • Limited Lifetime Product Warranty
  • Licensed, Insured & Bonded
  • 5-Star Service Reviews
  • Over 6000 Project Completed
  • Dedicated Project Managers
  • Indoor Climate Controlled

Contact Us Today

Check Out Our Reviews

Our customers absolutely love us! We have the best reviews across all platforms
for our excellent kitchen countertops, hands down!

Welcome to

Keystone Granite

Keystone 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.

Our materials are imported from all over the world. We are the accredited distributor for the most popular brands of engineered stone. Beauty does not have to mean expensive and painful. We offer competitive pricing and supply one stop shopping to our customers, as well as a very rapid turnaround time for installation.

Our Products

We offer widest selection of high-performance countertop surfaces.

Granite Countertops

Beautiful and one of the most durable natural stones, this is one of the best materials for stone surfaces in the home and exteriors of commercial buildings.

Marble Countertops

The luster and depth of true marble is incomparable to any other type of stone material, ideal for high-quality pastry tables and beautiful bathroom vanities

Quartz Countertops

Another brand of engineered quartz, this has a distinctive diamond-like shimmer due to a patented process of the manufacturer.


A brand of engineered quartz containing 94% quartz, it is a popular choice for kitchen and bathroom stone because the manufacturers offer a certified warranty


This engineered stone is made of 93% quartz and shares many of the features of other engineered quartz surfaces, which makes it ideal for kitchen.


Made of about 93% natural quartz, this is a durable and stunning material that comes in a wide range of patterns and colors kitchen.

Our Clients Says

Get a Free Quote

Getting a quote is made simple at Keystone Granite. Provide one of highly trained sales associates with dimensions, what type stone you would like, and by the end of the day, a quote will be provided.

Huge Selection of Granite Countertop Colors

Over 150 Stone Colors Available



Blanco Taupe

Steel Grey

Colonial White

Salinas White

Santa Cecelia

Nero Mist

Makalu Bay

Amarello Golden
Aqurella Blue
Black Marinacci
Black Sea
Magma Gold
Ornamental Light
Roma Imperial
Sienna Bordeaux
Silver Star
St Cecillia Light
St. Laurent
Stormy Night
Super White
Taj Mahal
White River
Wiscon White
Luxury Quartz Countertop Colors

Over 150 Stone Colors Available

Calacatta Botanica

Almond Roca

Mystic Gray

Sparkling White

Arctic White

Soapstone Mist


Fossil Taupe

Carrara Caldia

Almond Roca
Antico Cloud
Blanca Arabescato
Calacatta Classique
Calacatta Luccia
Calacatta Taj
Calacatta Venice
Carrara Marmi
Glacier White
Gray Lagoon
Iced Gray
Lagos Azul
Macaubas Wave
Manhattan Gray
Marquina Midnight
Pelican White
Montclair White
Peppercorn White
Sahara Beige
Calcatta Laza
Sparkling Black
Sparkling White
Statuary Classique
Toasted Almond


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


Our 100% positive feedback from customers prove that we offer a customer satisfaction service.


By keeping your busy schedule in mind, a special “Quick Turnaround” service is provided by our experts.


We use environmentally friendly materials that are non-toxic; yet, clean the dirt efficiently!


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


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

Keystone Granite & Tile

New Castle Showroom