Patina is a thin layer of tarnish that forms on the surface of certain metals, such as copper and br
Patina is a thin layer of tarnish that forms on the surface of certain metals, such as copper and bronze, over time. (It can also be used to describe the finishing on wooden furniture, or any artistic process that purposely changes the surface of a piece through age or exposure.) Pictured above is a statue of Joseph I of Portugal. The left photograph shows the statue with patina; the photograph on the right shows the natural bronze of the statue after being stripped of its patina. -- source link
#minerals#sculpture