A CBD crystal is 99.9% pure CBD and the purest form of CBD extract. Recrystallization is one of the methods used to isolate CBD. At this stage, CBD molecules bond together into a crystalline lattice. These crystals have a white, powdery appearance that is similar to salt or sugar. CBD crystals can be smoked or vaped. They can also serve as the base ingredient for other CBD isolate products by adding them to gummies, capsules, or carrier oils to make other CBD isolate oils.