Harital Vigyan effectively validates the ancient protocols of bhasmikaran process of arsenic containing drug Harital. Extensive research work has been carried out for other arsenic containing Ayurvedic drugs like Rasamanikya, Malla sindoor, etc. But proper scientific information about Harital bhasma is very scarce and scanty in scientific media. Hence this book bridges the gap for future study in between comparative study of Harital, Harital bhasma and Rasamanikya. This book effectively covers the classical review as well as modern review of Harital. Analytical studies are carried out by modern instrumentations like XRD, EDAX, STA, SEM, etc. Hence this book can be healthy handbook for researchers for further study toxic minerals of arsenic origin in Ayurveda.