Black Diamond, a cross between Blackberry and Diamond OG, is a strain originating in Northern California.  The plant's flowers have a beautiful purple color and sparkling trichome that make it as attractive as it is potent, and it has a sweet, pungent aroma.  Patients prefer this strain when they are looking for something that is effective but won't put them down for the count.  Black Diamond is a great strain for causing laughter and increasing appetites.