Nikolay V. Sobolev

TL;DR: In this paper, the composition of microinclusions in 26 fibrous cubic and coated diamonds from the Daldyn-Alakit kimberlite field, Yakutia were studied using EPMA and FTIR and the carbon isotopic composition of 4 of the diamonds was studied using SIMS.

TL;DR: Sobolev and Shatsky as mentioned in this paper showed that diamondieferous metamorphic rocks were metamorphosed at temperatures not lower than 900°C and established independent indicators of very high pressures (K in cpx, Al 2 O 3 in sphene, diopside-magnesite assemblage, coesite inclusion in zircon, presence of diamond itself), all testify to the crystallization conditions of diamond in its stability field.

TL;DR: More than 500 industrial quality diamonds of size range between 0.8 and 3mm containing olivine inclusions sometimes associated with enstatite, pyrope, chrome diopside and chromite were selected from current diamond production of nine major Siberian diamond mines as discussed by the authors.

TL;DR: In this article, microdiamonds from garnet clinopyroxenites of the Kokchetav massif (northern Kazakhstan) and associated alluvial diamonds have been investigated using infrared spectroscopy.

TL;DR: In this paper, the chemistry of exceptionally rare phlogopite inclusions coexisting with ultramafic (peridotitic) and eclogitic minerals in kimberlite-hosted diamonds of Yakutia, Arkhangelsk, and Venezuela provinces was discussed.