1. Rasasastra originated from Atharvaveda and further developed during medieval period as an auxiliary branch of Ayurveda focused on inorganic pharmaceutical preparations.
2. It was originally focused on spiritual goals but later focused on material goals like wealth and metals transmutation.
3. In late ancient and medieval periods, it focused more on medical applications, strengthening the body and curing diseases.
4. Key early texts include Charaka Samhita and Sushruta Samhita which mention use of minerals and metals in treatments. Rasaratnasamuchchaya by Rasa Vagbhata is an important medieval text.