GBC is the leading marble, granite, and natural stone supplier, fabricator, and installer serving the Washington, DC metropolitan area. We are specialized in kitchen countertops, bathroom vanities, bar tops, flooring, fire places, and stone furnishing for home or office. In a spacious and modern plant, slabs of stone are transformed into meticulously crafted marble and granite finished products on a daily basis. We also offer our clients a unique showroom displaying finished products and full size slabs of the most original materials from all over the world.