Keystone Marble and Granite is a leading supplier of marble and granite, serving residential and commercial clients in Delaware, Pennsylvania, and Ohio. With 25 years of combined experience among their fabricators and installers, they provide high-quality materials sourced from around the world. As an accredited distributor of popular engineered stone brands, they offer beautiful products at competitive prices, making quality affordable. Customers praise their excellent service, noting that the team is knowledgeable, skilled, and very accommodating. The company is known for its seamless measure and installation process, with installations completed on time and efficiently. Many reviews highlight the professionalism and courtesy of staff members, who go above and beyond to ensure customer satisfaction. Keystone Marble and Granite delivers a quick turnaround with a focus on customer happiness, making them a trusted choice for kitchen countertops, islands, laundry room counters, and backsplashes. Their dedication to quality and service has earned them high recommendations from satisfied clients.
Luciano and gorge are the best they arrived on time did an amazing job in a timely manner i am very impressed what great experience thanks again.
April 2026
Keystone did an awesome job with our new countertops!
September 2025
We've purchased several countertops through Keystone and every time they provide great customer service. Great product selection and very knowledgeable staff. I recommend them to everyone.
