Chapter 7: Dhatu-Upadhatu-Rasa-Ratna-Visha Varga

धातूपधातुरसोपरसरत्नोपविषोपविषविवर्गः

Chapter on metals, sub-metals, minerals, gems, poisons and sub-poisons used in Ayurvedic Rasa Shastra (metallic medicine).

Source: Astanga Hridaya Sutrasthan by Vagbhata