What are THC diamonds? THC diamonds aka THC crystalline look exactly like the little gems they are so fondly named after and are 99% pure THC-A. Their size is small and can resemble granulated sugar and at largest full-sized diamond look-alike that are a few millimeters wide. The remaining 1% of THC diamond is made up of terpenes and other cannabinoids. This is THC in its purest form possible. What is THC-A? THC-A is an inactivated cannabinoid. THCA is non-intoxicating on its own, but converts into the intoxicating THC when exposed to heat through decarboxylation. When THCA diamonds are vaporized through a dab rig, e-rig, or vaporizer, THCA decarboxylates into the active THC, which in turn binds with receptors in the body’s endocannabinoid system to produce an intoxicating effect. Best way to use THC diamonds Since THC diamonds only contain THCA adding them to a drink or an edible likely isn’t going to give you the effects you are seeking. The best way to use THC diamonds is to either smoke, vape or dab them. Basically, any method that utilizes a heating element that will reach 350 Fahrenheit or higher should be sufficient to release and activate the THC within.