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Looks like wool to me with a cotton weft. There are various tests which can find online that involve melting/burning a small amount of fiber. But I don't think there is a need to test in this case.
Not an old rug, so no real antique value. Replacement value is easy to find - just go to a rug store and see what they charge for the same size/quality. Or are you looking for value if you were to try to sell it without having a rug store to sell it from?
The Persian Mashad style seems to closely resemble yours. This place has Mashad, Wool, Hand-knotted, and Persian. It is a start.