CBD Terpsolate Crystal 99% CBDSearching for CBD isolate crystals? As you might’ve guessed from the name, CBD isolate refers to CBD that has been “isolated” from all other hemp compounds. When finished, these isolate products are composed of at least 98 percent pure CBD. People who want CBD isolate but don’t like the powdery texture could look into CBD isolate crystals. The extraction process for CBD isolate powder and crystals is almost identical, but there’s one crucial difference at the end phase. Once scientists detect their CBD is close to 100 percent, they use a germination blanket to keep the purified CBD in a cold, dimly lit area.