Crumble is a kind of BHO (butane hash oil) which is persecuted for a long time at low temperatures in a vacuum oven, and whipped during the purging period. This is for the purpose of softer consistency, yet allows it to remain brittle enough to crumble in your hand. same like other cannabis concentrates, crumble is much more powerful than flower, kief or hash.
Essential oil extracted from these materials is highly concentrated and contains very high amounts of THC. Non-transparent extracts like crumble (which can be seen as a form of wax) are whipped during manufacture which causes the solids, such as THCA, to separate from the liquid elements like terpenes.
As compared to any other concentrate crumble has highest terpene. As a result, it is ideal for the users who value flavor and aroma above all else. To retain terpenes,if possible perform a lengthy vacuum purge for several days , and keep the heat level down.