Onyx is a modern autoflowering variety developed through the crossing of White Russian and NYC Diesel. This genetic pairing integrates established genetics into a simplified growth structure, resulting in a plant that flowers in just 54 days. Due to its balanced and accessible profile, Onyx is categorized as easy to grow, showing versatility in both indoor and outdoor cultivation environments, though growers should anticipate a low yield.

The chemical profile of Onyx is complex and led by myrcene, followed by terpinolene, caryophyllene, humulene, and limonene. These dominant compounds are further rounded out by nerolidol, linalool, bisabolol, caryophyllene-oxide, beta-pinene, camphene, pinene, p-cymene, and ocimene. This diverse array of terpenes suggests a multifaceted sensory experience, grounded in the primary presence of myrcene and the subsequent notes of terpinolene and caryophyllene.

As a THC-dominant cultivar, Onyx is primarily utilized for its ability to induce feelings of relaxation, happiness, and an uplifted mood. These effects make it a consistent choice for individuals seeking support with stress, pain, and sleep-related concerns. The influence of this strain within the breeding community is demonstrated by its role as the parent to the notable offspring, Big Domina.