Karite – diamond fossil: A new type of natural diamond

Impact diamond is one of perspective natural type of superhard carbon materials, forming huge resources sometimes, such as Popigai impact structure counting the largest diamond storage on the Earth. By present, there are two known types of impact diamonds – after-graphitic and after-coal varieties formed from different carbon precursors. Here we present for the first time a new impact diamond type – diamond fossils, named by “karite”, formed...