In a cannabis context, the term diamond has a few different meanings. It’s often used to describe pure tetrahydrocannabinolic acid (THCA) crystalline, diamonds or “THC diamonds,” as well as THCA crystalline that was developed in the presence of a terpene-rich solution diamonds are characterized by their crystalline appearance. Once THC is reduced to its purest state, crystallization occurs, creating a substance that shines like no other concentrate on the market. THC-A diamonds are truly the purest and most potent form of THC. The average strength of cannabis flowers is at 25% THC, while concentrates are usually around 70 to 90% THC.