Electron-microscope study of micromorphology of picroilmenite from the kimberlite pipes of Yakutia

The many varied shapes in microsculpture of the mineral (fig. 1-8) are very much like those in pyrope, olivine, other associates of diamond, and in sheared surfaces of diamond itself. The electron-microscopic evidence suggests abrupt and radical changes in conditions of crystallization of all of them, including the picroilmenitic aggregate, which led to cataclasm, partial solution, etching recrystallization, etc. -- V .P . Sokoloff.