The most exclusive procedure in the processing of Acquerello is the reintegration of the gem which has been patented. The gem is the vital part of rice, the embryo of the new plant that contains the most valuable nutrients of rice, in particular mineral salts and vitamins. The patent consists in replenishing the gem (after having separated it from the chaff) to the grain of rice with a simple and mechanical mixing method and slow rubbing between rice and gem to obtain complete reabsorption of the gem on the outside of the grain. In this way, the white rice grain maintains the most precious nutritional properties otherwise contained only in brown rice. Carnaroli Variety Long Grains A.