|— Group —|
|Structural classification||Igneous rocks of plutonic origin|
|Parent body||4 Vesta|
|Composition||Primarily magnesium-rich orthopyroxene, a little plagioclase & olivine|
|Total known specimens||~40|
Diogenites are composed of igneous rocks of plutonic origin, having solidified slowly enough deep within Vesta's crust to form crystals which are larger than in the eucrites. These crystals are primarily magnesium-rich orthopyroxene, with small amounts of plagioclase and olivine.