Colonial Marble and Granite We are the leading stone fabrication and installation company in Pennsylvania, New Jersey, and Delaware. With 4 locations we now serve all of PA, NJ, MD, DE and metro Philadelphia and New York City. We carry over 450 colors of granite, marble, onyx, quartz, quartzite and more with 4,500 slabs at our locations. 100% Satisfaction Guarantee We install countertops for home and office in kitchens, bathrooms, bar and outdoor entertainment areas. We have a full commercial division that installs stone in apartment buildings, condos, stadiums, offices, buildings and yachts. We pride ourselves on offering the greatest selection and highest quality materials at the lowest installed price.