Rupa Makkhi, also known as Roopa Makhi, Rupya Makshik, or Rajata Makshika, is a naturally occurring mineral traditionally used in Ayurvedic Rasashastra, the branch of Ayurveda dealing with metals, minerals, and herbo-mineral preparations. It is regarded as a valuable mineral ore that undergoes extensive purification (Shodhana) and incineration (Marana) before being used medicinally as Rupya Makshik Bhasma