Freebase DMT
From DMT-Nexus Wiki
Freebase DMT is the pure alkaloidal form of N,N-Dimethyltryptamine, though it is often used in reference to the freebase form of extracts in which the primary--but not only--active is DMT. This is the form of DMT most commonly used for administration by inspiration through heating it to the point of vaporization. In it's pure form with a uniform structure, it can appear as a clear white crystalline product, but it can be yellow and oily or even waxy or clay-like in it's less structured or less pure forms, depending on the manner of crystallization.