Black seed, nigella or kalonji, is also known as the seed of blessing as it is considered to be one of the greatest healing herbs of all times. The small black seeds are got from kalonji bushes, which are grown widely throughout India. The seeds are about the same size as sesame seeds, though they have a more triangular instead of oval shape. Apart from being a wonderful medicine, kalonji is a superb spice, used to flavour a variety of traditional dishes including pickles.