This document discusses the mineral Makshika (Chalcopyrite). It provides the Sanskrit, Hindi, and English names. It details the chemical formula and properties such as color, crystals, fracture, and hardness. It describes the occurrence in India and types based on color. Purification and processing methods are explained, including heating with oils and crushing. The therapeutic uses and formulations using Makshika bhasma are mentioned. Rajata Makshika (Iron Pyrite) is also briefly discussed.