Rasaratna Samuchaya

रसरत्नसमुच्चय (Sanskrit in Devanāgarī script) or Rasaratnasamuccaya (Sanskrit in IAST transliteration), variously transliterated as Rasaratna Samuchchaya, Rasaratna Samucchaya, etc., is an alchemical work written in India, in the Sanskrit language, and datable to the thirteenth or fourteenth century or to the sixteenth century. The text contains detailed descriptions of various complex metallurgical processes, as well as descriptions of how to set up and equip a laboratory (ch.10) and other topics concerning Indian alchemy. It is a work that synthesises the writings and opinions of several earlier authors and presents a coherent account of medieval Indian alchemy.