Hash is a cannabis extract, made when trichomes on the surface of plants are removed and processed. It usually has an Abundant amount or resin in it which makes for its dark green coloration with browns being present as well depending how old they were before processing started (though this can change). Hash comes packed into small bricks that you might find at your local head shop!
The word “hashish” is derived from the Arabic language, which roughly translates to mean “a type of grass.” The popularization and introduction into society for this plant was around 900 B.C. However it has been shown that some types existed as early as 600 B.C., when cannabis resin started being used in Arabia during religious rituals by priestesses who would smoke marijuana while they prayed or made offerings on behalf of their god.