The quality of a hand tufted rug is primarily determined by its fiber content and pile density. New Zealand Wool is the gold standard for durability and natural stain resistance. For a luxury sheen, Botanical Silk or Viscose is often blended. Ensure the pile weight is at least 4.5 lbs per square yard and the pile height meets your specific project needs (typically 10mm-12mm for residential use). Always verify the primary and secondary backing materials, such as 100% cotton canvas, to ensure structural integrity.