Whereas hemp seed oil or MCT ie. Coconut oil is added to the CBD concentrate for CBD oils. Not the case for CBD crystals. The crystals are pure CBD without any additions and 98% pure. If you then inhale this CBD through a vaporizer, you will quickly become aware of its effects. 

It is also possible to put the crystals under the tongue. These crystals are then dissolved in the saliva and absorbed by the body through the oral glands. 

Many applications are possible. Vaporizing CBD, or directly taking in CBD under the tongue.