New Delhi, 21 August (NNS): Here, the prices of black pepper rose by Rs 10 to Rs 670 per kg because of the limited support of buying from the stockists at the higher level. Before this, the prices have gone up by Rs 10/20 per kg. The arrivals reported to be negligible in Kochi and the prices held stable at the level of the previous day, due to this, the market sentiments may affect. There is no fear of downtrend in the prices during the coming days.