Nagarjuna (metallurgist)
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Nagarjuna was an Indian metallurgist and alchemist, born at Fort Daihak near Somnath in Gujarat in 931. He wrote the treatise Rasaratnakara that deals with preparations of rasa (mercury) compounds. It gives a survey of the status of metallurgy and alchemy in the land. Extraction of metals such as silver, gold, tin and copper from their ores and their purification were also mentioned in the treatise. He also wrote Uttaratantra as a supplement to Susrutasamhita, dealing with preparation of medicinal drugs, and an Ayurvedic treatise, Arogyamanjari. His other treatises are Kakshaputatantra, Yogasara and Yogasatak.
