6mm stained glass panel

As a material stained glass is glass that has been coloured by adding metallic salts during its manufacture.

The coloured glass is crafted into  stained glass windows in which small pieces of glass are arranged to form patterns or pictures, held together (traditionally) by strips of lead and supported by a rigid frame.

Painted details and yellow stain are often used to enhance the design. Stained glass is also applied to windows in which the colours have been painted onto the glass and then fused to the glass in a kiln.

Stained glass has been applied almost exclusively to the windows of churches and other significant buildings. Although traditionally made in flat panels and used as windows, the creations of modern stained glass artists also include three-dimensional structures and sculpture.