National Granites – Exclusive Showroom for Granites & Solid … National Granites, Granites, Marbles, granite dealer, Phase 1, New delhi, Stosa, italian Marbles, Established in 1994, NATIONAL GRANITES is a onestop shop for any kind of premium quality granite, Italian marble and solid surfaces. For over two decades, the name is synonymous with grandeur, finesse and quality that can only be expected from the most superior class of granite.