Oldest mineral on lutetia asteriod

21 Lutetia

It measures about 100 kilometers in diameter (120 km along its major axis). It was discovered in 1852 by Hermann Goldschmidt, and is named after Lutetia, the Latin name of Paris.The composition of Lutetia suggests that it formed in the inner Solar System, among the terrestrial planets, and was ejected into the asteroid belt through an interaction with one of them.[24]

http://spaceref.com/asteroids/the-complex-history-of-asteroid-lutetia.html

Hope this helps.