Accredited by The Natural Stone Institute

Only the finest companies in the industry can meet all of the qualifications necessary to earn Natural Stone Institute Accreditation. K.G. Stevens has proven that our fabrication and installation methods are best-in-class and that safety is a top priority, and as a result, has earned this honor. Less than 100 fabricators in the U.S. have received this level of accreditation.


The Natural Stone Institute Accreditation for natural stone fabricators and commercial contractors recognizes those companies that meet the industry’s highest standards for business activities, product knowledge, reliability, fabrication, and installation. The Natural Stone Institute accredits companies, not individuals.

To earn Natural Stone Institute Accreditation, a company must complete an intensive, rigorous process that includes documentation of its business and employment practices, letters of recommendation, a written examination, and site visits to the facility and completed jobs.

Companies that achieve Natural Stone Institute Accreditation exemplify best practices in these areas:

  • Physical facilities and equipment
  • Business and trade practices
  • Technical knowledge and expertise
  • Quality control
  • Safety
  • Finance
  • Ethics
  • Customer service and education
  • Advertising and promotion
  • Employee policies including training, discipline, and termination


The Natural Stone Institute offers three categories of Accreditation:

  • Natural Stone Fabricator (primarily residential interior)
  • Commercial A Contractor (heavy commercial)
  • Commercial B Contractor (light commercial).

A company may be accredited in more than one category, depending on its business model.

The Accreditation Program continues the Natural Stone Institutes’ more than 70-year history of promoting excellence and accountability in the natural stone industry. For residential or commercial applications, Natural Stone Institute Accreditation signifies that a natural stone fabricator or contractor:

  • is experienced in stone fabrication, installation and maintenance is a solid, reputable business
  • operates in a responsible manner in compliance with OSHA standards is dedicated to a quality product, quality installation, and total customer satisfaction.


When you are shopping for a natural stone fabricator or commercial contractor, look for the Natural Stone Institute Accreditation seal. It is a meaningful quality indicator because only the finest companies in the industry can meet all of the qualifications necessary to achieve Natural Stone Institute Accreditation. The Natural Stone Institute Accreditation seal protects residential and commercial customers from unscrupulous businesses, poor quality products, and shoddy workmanship.

When you work with a natural stone fabricator or commercial contractor displaying the Accreditation seal, you can be confident that your project will be completed in a professional manner, that questions or concerns will be promptly addressed and that your satisfaction will be the company’s priority. The Natural Stone Institute Accreditation seal means peace of mind, from the selection of the slab through fabrication, installation, and beyond.


All content on this page is originally from Natural Stone Institute

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