This paper discusses results from mineralogic, petrographic, and petrochemical studies of diamond-bearing volcanic rocks that were erupted by the 2012-2013 Tolbachik Fissure Eruption. This is the first time that the reader can find an integrated description of crystal-morphologic, spectroscopic, thermal, and isotopic-geochemical properties of diamonds extracted from fresh basaltoids. We examined the micromineralizations that are accessory to the diamonds and provide a rationale for why the type (previously unknown) of non-kimberlite diamond findings should exist in nature.