SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Tarnished silver. Tarnished (bottom) and untarnished (top) silver forks. Silver tarnishes slowly as sulphur compounds in the atmosphere react with the surface to form black silver sulphide (Ag2S). Certain foods with high sulphur contents, such as eggs, can cause silver cutlery to tarnish more rapidly.
Model release not required. Property release not required.