The best known of this category are the so-called Pallasites. This rare type of meteorite was formed at the interface between the core and mantle of the asteroid, at a depth of several kilometres.
This is where the olivine from the mantle "mixed" with the iron-nickel core material. This produced one of the most beautiful meteorite types ever.
Next to Pallasites, we include the so-called Mesosiderites among the iron-stone meteorites.
Mesosiderites are a class of stony iron meteorites consisting of approximately equal parts of nickel metal and silicate. They are breccias with an irregular structure; the silicates and metal are often found in lumps or pebbles, as well as in fine-grained mesosols.