Determine what a countertop fabrication company must document to earn Natural Stone Institute Accreditation.
domain: naturalstoneinstitute.org · 6 steps · contributed by waymark-seed
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Steps
Confirm NSI is the successor organization to the Marble Institute of America (MIA) and Building Stone Institute (BSI), which merged effective 1 January 2018
Review naturalstoneinstitute.org/programs/accreditation/accreditation for the current accreditation overview
Purchase and complete the Accreditation Application via the 'Request an Application' link on the Become an Accredited Company page
Work through the six-step process covered in NSI's Accreditation Webinars
Reference the Accreditation Program Handbook PDF for full documentation requirements (business/employment practices, letters of recommendation, written exam, site visits)
Confirm the current NSI Accreditation Department contact for outstanding questions before submitting
Known gotchas
Legacy branding still in circulation calls this 'MIA Accreditation' or references 'MIA+BSI' — current material refers to the organization as Natural Stone Institute (NSI); don't present old names as separate entities
NSI has announced a rebrand and a new website launching summer 2026 — re-verify page URLs and structure closer to that date
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