A Metallic Dragon is a variety of dragon in the Dungeons & Dragons universe. They are the counterparts to the chromatic dragons. The 4th Editon Draconomicon raised the adamantines, cobalts, irons, mercuries, mithrals, oriums, and steels to metallic dragon status.

Adamantine Dragons
Brass Dragons
Bronze Dragons
Cobalt Dragons
Copper Dragons
Gold Dragons
Iron Dragons
Mercury Dragons
Mithral Dragons
Orium Dragons
Silver Dragons
Steel Dragons