Iron outside = Iron inside

<< My understanding is that the majority of asteroids appear to be
carbonaceous chondrites. >>

That's exactly right. I used the word "stoney" instead. (Same
thing.) They are rocky, or stoney, virtually identical to the rocks
you see on earth. So much so, even though stoney meteorites are the
most common they are also the most difficult to identify
as "meteorite" because of the similarity to ordinary earth rocks.

George