Cast Iron is a muted, medium-dark gray with cool undertones and a matte finish. It had medium coverage, which was somewhat buildable. The consistency was soft, thin, and a little prone to sheering out, so it was not the easiest to use as a lid color. It could have been easier to diffuse and blend out the edges, though. The eyeshadow started to fade after seven and a half hours of wear.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.