New Delhi, 29 July (NNS): The prices of cumin descended by Rs 500 to Rs 28000 per quintal due to the feeble buying from the stockists even after the sluggish prices. However, the prices have gone up by Rs 500 per quintal during the weekend. Today, there was no auction in Unjha due to the constant rainfall. The active contract prices went up by Rs 335 or 1.26 percent to Rs 26820 per quintal. There is no possibility of long uptrend in the spot cumin prices during the near future.