In most Persian rugs, the pile is of sheep's wool. Its characteristics and quality vary from each area to the next, depending on the breed of sheep, climatic conditions, pasturage, and the particular customs relating to when and how the wool is shorn and processed.
Most Oriental rugs are made of wool pile on cotton foundation although they can also be made of wool-on-wool, wool-on-silk or even silk-on-silk. Wool is clipped from sheep twice a year, washed, carded and then spun into yarn. An Oriental rug is a hand-knotted or hand-woven loomed textile which comes from the Near, Middle or Far East. The major Oriental rug producing countries include Turkey, Iran, the Caucasus, Afghanistan, Pakistan, India, Nepal and China. Other countries such as Egypt and Romania have smaller productions 1. The Issue. Woven into the fabric of Iranian history, religion, society, and culture for more than 2,500 years, Persian rugs are geographically integrated into Iran. When a rug is made in Persia, it is synonymously linked with Iran-Persia and Iran meaning the same thing when referring to rugs. Another unique quality of Persian rugs is their historical link. Of course, rugs made during the Safavid period are prized because of their unparallel quality and design. However, Persian rugs are still famed for their ties with its regional historical connection. A Persian carpet (Middle Persian: bōb, Persian: فرش ‎‎ farsh, meaning to spread; sometimes قالی qālī) is a heavy textile, made for a wide variety of utilitarian and symbolic purpose, produced in Iran and surrounding areas which once belonged to the Persian Empire, for home use, local sale, and export. Carpet weaving is an essential part of Persian culture and art. Within the group of Islamic carpets produced by the countries of the so-called rug belt , the Persian carpet stands out by the variety and elaborateness of its manifold designs. In most Persian rugs, the pile is of sheep's wool. Its characteristics and quality vary from each area to the next, depending on the breed of sheep, climatic conditions, pasturage, and the particular customs relating to when and how the wool is shorn and processed. Carpet weaving is an essential part of Persian culture and art. Within the group of Islamic carpets produced by the countries of the so-called rug belt , the Persian carpet stands out by the variety and elaborateness of its manifold designs. Although the term Persian carpet most often refers to pile-woven textiles, flat-woven carpets and rugs like Kilim, Soumak, and embroidered tissues like Suzani are part of the rich and manifold tradition of Persian carpet weaving. Carpet weaving is an essential part of Persian culture and art. Within the group of Islamic carpets produced by the countries of the so-called rug belt , the Persian carpet stands out by the variety and elaborateness of its manifold designs. Add classic elegance and rich texture to your home with a Persian rug. These stunning area rugs, which date back to ancient Persia, are traditionally made in Iran, though the designs are often copied and made in other countries, too. Most Persian carpets and rugs made in Iran are handmade, many of them with hand-dyed yarn and traditional weaving techniques. These exquisite handmade Persian rugs are always made with natural fibers, such as wool, silk, or cotton, and can last for up to 80 years if cared for properly. Persian rug value means a lot of things to me but basically the most important factors that affect its value are authenticity, quality of materials, finesse of the knots and beauty of colors and design. i think these factors are enough to create amazing Persian rug value. Besides, Persian rugs value and its art value seems an unplanned effect but in fact this is an art form that is very dependent on symmetrical patterns, designs and the repetition of these patterns. Quality of Materials. Other considerable factor that creates Persian rugs value is its materials quality, off course in some oriental rugs, weavers use synthetic fabrics that makes a lower value rather than natural fibers.. which are.. Besides, Persian rugs value and its art value seems an unplanned effect but in fact this is an art form that is very dependent on symmetrical patterns, designs and the repetition of these patterns. Oriental Rugs vs. Persian Rugs. As important as the construction is to the rug, its origin is just as integral to the design, history and workmanship of the rug. Often Oriental and Persian rugs are referred to interchangeably. However, there is actually a difference and “rugophiles” are of the opinion that it is a very big one. 
http://www.kebabians.com/what-makes-an-authentic-oriental-rug/ http://www1.american.edu/ted/persian-rugs.htm https://en.wikipedia.org/wiki/Persian_carpet https://en.wikipedia.org/wiki/Persian_carpet https://en.wikipedia.org/wiki/Persian_carpet http://www.overstock.com/guides/tips-on-buying-a-persian-rug http://rugs-oriental.net/persian-rug-value.html http://rugs-oriental.net/persian-rug-value.html http://arearugfacts.com/oriental_vs_persian.php
what makes it a persian rug