Smooth or glossy by or as if by rubbing or polishing.

made smooth and bright by or as if by rubbing; reflecting a sheen or glow; "bright silver candlesticks"; "a burnished brass knocker"; "she brushed her hair until it fell in lustrous auburn waves"; "rows of shining glasses"; "shiny black patents"

Smoothed by rubbing or polishing. Traditionally a piece of polished stone was used to burnish gold leaf.

Induced shine accomplished by ironing the skin.

"Enhancing the smoothness and shininess of a surface such as metallic [gold leaf] by polishing with a burnisher - a smooth, hard stone, metal, or bone set into a handle" (Brown 28).

A dark metallic finish with a deep bronze, copper, or brass color popular in vintage inspired costume jewelry