Smaller piece around 10 in tall plate steel twisted and welded. 

Twisted crescent shape with lots of natural color exposed. Around 20 in tall formed from 3/16 plate.

Showing the natural colors that have been brought out through repeated heating and cooling.

The above two images are of the same piece to show how it can be arranged to create
 different effects.

Twisted steel ribbon acid dipped for color and patina approx 2 feet tall.