Chapter starts off with amalgam alloy composition, history of amalgam in dentistry. Classification of amalgam alloy powder is explained. Amalgamation reaction of high copper and low copper amalgam is explained in detail, Dimensional properties and strength of amalgam is explained. Manipulation of amalgam like alloy powder mercury ratio, trituration and condensation are elaborately discussed. Advantages and disadvantages of amalgam are outlined. Mercury waste management is discussed for proper disposal of mercury in dental operatory. Chapter concludes by discussing about the recent advancements in amalgam like mercury free alloys.