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. 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.