(c) $Argentite\ \ \ \ \ \ \ \ \ \ {Ag}_{2}S$ $Haematite\ \ \ \ \ \ \ \ {Fe}_{2}O_{3}\ \$ $Malachite\ \ \ \ \ \ \ \ \ Cu(OH)_{2}.{CuCO}_{3}\ \ \ \ \ \ \$ $Calamine\ \ \ \ \ \ \ \ \ \ {ZnCO}_{3}$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.