In particular , all basalts brought by the Apollo 11 , 12 , 15 and 16 missions contain about 1 % of troilite .
It forms about one percent of the lunar crust and is present in any rock or meteorite originating from moon .
All basalts brought by the Apollo 11 , 12 , 15 and 16 missions contain about 1 % of troilite .
It forms about one percent of the lunar crust and is present in any rock or meteorite originating from moon .