The precious black truffle grows from December to March, at variable altitudes, from 300 to 900 meters above sea level, on steep rocky ground, it prefers moist soils without stagnation. Main plants that favour its growth are the black hornbeam, holm oak, sessile oak, Turkey oak and hazelnut. The internal part, called gleba, is black-brown and becomes completely black with reddish/purple reflection at riping. The veins are whitish, thin, dense and branched. The external part, called peridium, has a warty surface, with pyramidal warts that adhere strongly to the gleba, the external colour varies from reddish-brown to black. The flavour is pleasant: aroma and taste recall chocolate.