Ackermand et al.(2006): Lazulite-bearing metaquartzite of the Itremo Group (Central Madagascar); Scientific significance and economic importance in Proceedings of the Malagasy-German Research Cooperation in Life and Earth sciences, 5-18
The fastest fighter aircraft is the MiG 25, with speeds topping at Mach 3.2 (2,450 mph/4,000 km/h). Pilots were not allowed to go beyond Mach 2.8. Above Mach 2.8, the engines would overheat and burn up.
Well it really depends!!! At takeoff the estimated speed for a jet plane is around 450-600 MPH. It depends on its weight, amount of passengers, amount of luggage and other things of that sort. Commercial jet aircraft fly at about Mach 0.88 -- around 500 statute miles per hour.