Natural Stone Institute Accreditation


The Natural Stone Institute is a trade association representing every aspect of the natural stone industry. They serve as the authoritative source for safety and technical standards and information regarding the use of natural stone. Their Accreditation Program represents nearly 150 companies which service almost the entire United States and parts of Canada. It is a multi-attribute, third-party verified credential that is earned only by those able to meet the highest standards for excellence in quality, safety, and customer service.

   Click the icon to view the Quality Assurance Specification Language document

Visit the NIS website to learn more  ›