Blackberries are characterized by their Colouring, their unique composition and their flavours. Like raspberries, Blackberries are not technically a berry, but rather an aggregate fruit of individual drupes held together by very fine, nearly invisible hairs. Blackberries do not have a hollow centre, instead they have a solid, edible core. When ripe, Blackberries have a deep inky sheen with purple highlights. They are succulent, soft, and juicy. Their flavour is sweet, slightly tart, with earthy undertones.