gems, beryl, emerald, Russia, Malysheva, Russian beryl, emerald mines, Ural Mountains, locality, species

Examines structural and lithological controls on emerald distribution in Russia’s Malyshevskoe emerald–beryllium deposit. The study describes ore bodies and ore shoots, identifying longitudinal, transverse, and down-dip zoning within an ore zone dipping southward at approximately 50°. Statistical analysis demonstrates a close relationship between emerald content and the thickness of glimmerite veins, with emerald distribution following a lognormal pattern. Regression equations and a predictive longitudinal section are developed to assess emerald-bearing potential. Recovered emeralds are also classified by quality, color, and size.