Old Persian rug hand-knotted Persian rug. Dorokhsh Hills is located in Birjand county in south Khorasan, Iran; Dorokhsh rugs are known for their tight weave and are mostly subtle and light in color. Beautiful Rugs is offering this unusual allover Birjand rug with a deep, rich navy blue color in the background; red, blue, brown, and green are some of the other colors used in this old and decorative Dorokhsh rug. 100% soft wool pile on cotton foundation and is in excellent condition. Rug size 10×13.4.