THCa THCa, often referred to as diamonds, is a byproduct of HCFSE. This extract is a high potency, low terpene concentrate. Testing around 90% THCa, this concentrate has little to no taste or smell but packs a high potency punch. Terpene: a hydrocarbon; the fragrant oil responsible for individual cannabis strains effects, flavors and aromas.learn more What's NOT in your concentrate is just as important as what is.We're 100% transparent about what is in your concentrate. Search