New Delhi, 11 August (NNS): The prices of cumin declined by Rs 600 to Rs 21000 per quintal because of the weak buying from the stockists even after the feeble prices. Before this, the prices have gone down by Rs 200 per quintal. There were around 7000/8000 bags of cumin reported to arrive and the prices held stable at the same level of the previous day. The active contract prices gained by Rs 115 or 0.60 percent to Rs 18870 per quintal because of the limited speculative buying. The spot coriander prices will likely to remain high during the near future.