When a large meteorite collides with the Earth, it can be travelling upwards of 40 Kilometres per second.  This collision releases a huge amount of energy, which can vaporize rocks and create interesting and unique geological structures. For decades, scientists have been debating the existence of a rare type of crystal called Lonsdaleite, which is associated with impacts.  Strange small crystals were discovered in Arizona in the 1950s around an ancient impact crater called ‘Canyon Diablo.’  It led some scientists to believe that the mineral had mechanical properties similar to diamond, but that it was structurally superior. If it existed in a pure form...