Rosin made from hash, or hash rosin, is considered by many to be one of the purest forms of cannabis concentrate. Cannabis rosin is made by combining high heat and immense pressure. Terpene and cannabinoid-rich oil (resin) is forced out of cannabis plant material called trichomes using a rosin press.Rainbow Belts, also known as "Rainbow Belt," is an indica marijuana strain made from by crossing Moonbow with Zkittlez. The effects of Rainbow Belts are mostly calming. Consumers say this strain offers a euphoric high that leaves you feeling happy and relaxed.