For gandhAra(***) = sindUra, you may refer to Kaiyadevanighantu, 2.67 (synonyms of sindUra): http://kjc-fs-cluster.kjc.uni-heidelberg.de/dcs/index.php?contents=fundstellen&IDWord=47040&IDText=77 or "Wörterbuch der m.a. indischen Alchemie", p. 243. Best, Oliver