New Delhi, 25 July (NNS): The prices of big cardamom Kainchicut gained by Rs 20 to Rs 1590 per kg owing to the weak offtake at the higher prices. Recently, the prices have gone up by Rs 10 per kg. The average auction price reported to be at Rs 1250/1812.50 per kg in the last auction which held on 12th June. The market sentiments may affect because the new crop will likely to arrive after 20/25 days. The spot big cardamom prices will not likely to decrease during the coming one or two days.