"LUMINOSITY" - Photograph of crystalline THC found in cannabis"Luminosity" will bring any space to life with its soaring color and patterns. Tetrahydrocannabinol crystals (THC) were grown by evaporation on a glass microscope slide, then photographed through a microscope. THC is a psychoactive component of the hemp plant, which was first domesticated over 12,000 years ago. The crystal facets create the colors by the refraction of light as it passes through the prism like crystalline array.