// Definition
The process by which THC crystals form in cured hash rosin over time. Nucleation is the initial formation of crystal seeds, often starting on polar glass jar surfaces, while crystallization is the continued growth of those crystals when cannabinoids exceed their solubility in the terpene-fat matrix.
// From the Episode
Colin showed a 3-year-old Chem TK rosin jar with visible crystallization along the glass bottom. Dr. Mark explained the polar glass surface creates nucleation sites. The lighter crystalline layer at the bottom may contain different cannabinoid ratios than the darker upper portion.