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'''Heriz rugs''' are hand woven in the East Azerbaijan Province of northwestern Iran. Heriz is a very important production center of Persian carpets. Heriz rugs are the most sought after of the tribal rugs. Antique Heriz Persian carpets called Serapi (woven before 1900) are extremely valuable and highly collectable. Most weavers use the Turkish double knot, while the KPSI (knots per square inch) will vary depending upon the quality of the carpet. Heriz Persian carpets from the town's workshops are of better quality than those from the remote mountain villages. The silk Persian carpets are exceptionally finely knotted and are both very rare and absolutely exquisite.

Heriz rugs are hand woven in the East Azerbaijan Province of northwestern Iran. Heriz is a very important production center of Persian carpets. Heriz rugs are the most sought after of the tribal rugs. Antique Heriz Persian carpets called Serapi (woven before 1900) are extremely valuable and highly collectable. Most weavers use the Turkish double knot, while the KPSI (knots per square inch) will vary depending upon the quality of the carpet. Heriz Persian carpets from the town's workshops are of better quality than those from the remote mountain villages. The silk Persian carpets are exceptionally finely knotted and are both very rare and absolutely exquisite.

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