Minerals and Metals in Ancient India v2.c44.s3.17

v2.c44.s3.17

In his *Rasa-Ratnākara* (*RR*), Nāgārjuna dwelt on several other topics related to minerals and metals: purification of *rājāvarta* or lapis lazuli (*RR*, 1), extraction of metals from chalcopyrite (*mākṣika*), lead ore (*capala*), purification of crude molten copper by poling (*RR*, 14), extraction of metal from *vaikrānta* (*RR*, 23-25), extraction of metal from *vimala*, *darada* (cinnabar), etc.