Is my skin horn or iron?

[Ravingdork]

Is my skin made of horn, or of iron? What is this ikon supposed to be called?

My book says Skin Hard as Horn (p.46), but the Archives of Nethys calls it Skin Hard as Iron.

[Farien]

Describe it like zebra stripes, only different.

[The Raven Black]

Pathbuilder goes for the Horn.

[YuriP]

Nexus goes Hone too.
The thing is more horny than AoN put in. :P