A Heris Rug is a type of Persian rug from the area of Heris in northwest Iran northeast of Tabriz. The Heris Rug is produced in the villages of the slopes of Mount Sabalan. It is an extremely durable hard-wearing rug and the Heris rug has now passed the Bijar rug as the Iron Rug of Iran. Heriz Rug is thick, tough, and often inexpensive which appeals strongly to the US market. Part of the reason for the toughness of Heris carpets is that Mount Sabalan is sitting on a major deposit of Copper. Trace copper in the drinking water of the sheep produces high quality wool. The copper makes the wool stronger and far more resilient than wool from other areas. Heriz rug includes rugs from the towns of Ahar, Heris, Mehraban, Sarab, Serapi, Bakhshaish and Gorevan. Heris rugs are of coarse construction. The rugs range from 30 KPSI on the low end to 100 – 110 KPSI on the high end. It is rare to see a rug over 100 kpsi that would look like an authentic Heris unless it is an antique silk Heriz.
Their most famous design consists of a very large diamond medallion or a star-like floral medallion with eight petals and corners very similar to the centerpiece medallion. These corners are sometimes square or rectangular. The pattern is almost always geometric. Usually the background is very crowded; however, sometimes they have a plain background, especially the older rugs. Although not as common, some Heriz rugs have an all-over layout often with geometric floral motifs such the shah abbasi and less frequently curvilinear floral motifs.The favorite colors of Heriz rug weavers consist of brownish red, light and dark pink, light and dark blue and ivory. Blue is normally used to add contrast. Today, Heriz style is copied by India, Pakistan, China and Romania. Other market trade names such as Bakhshayesh, Mehraban, Serapi, or Gorevan are also given to Heriz rugs.