Russia: Ural Gem Deposits Overview

The Ural Mountains of Russia host an unusually dense concentration of rare and
collectible gem varieties: demantoid garnet (the finest andradite, with the highest
dispersion of any natural garnet), the benchmark alexandrite as the global standard
for chrysoberyl colour-change quality, and Ural emerald from the Malyshevsky deposit. The Ural belt stretches approximately 2,500 km, formed during Late Palaeozoic
(350–290 Ma) plate suturing. ^[1]

All three Ural types share a geological connection: contact zones between granitic
pegmatites and Cr-enriched mica schists or serpentinised ultramafic bodies supply
unusual elemental combinations that enable chrysoberyl, beryl, and andradite to form
gem crystals in the same belt. The horsetail of demantoid, the phlogopite mica of Ural
emerald, and the fluid inclusions of alexandrite provide origin-specific fingerprints
laboratory reports confirm. ^[2]

Russia also operates the world's largest diamond production by volume in Yakutia, with
the Mir and Udachnaya pipes among the most productive ever worked; however, Yakutian
diamond has no bench-level fingerprint distinguishing it from other kimberlitic origins.

• Discovered 1860s; Bobrovka River and Sysert area, Sverdlovsk Oblast
• Andradite garnet (Ca₃Fe₂(SiO₄)₃), Cr³⁺-coloured; highest dispersion of
  any natural garnet (0.057; exceeds diamond 0.044)
• "Horsetail" inclusion is the single most diagnostic Ural feature
• See dedicated file: origin/russia/demantoid

• Discovered 1830; Tokovaya River district, ~80 km east of Yekaterinburg
• Named for Tsarevich Alexander (later Tsar Alexander II)
• Russian alexandrite = global benchmark for colour-change quality
• See dedicated file: origin/russia/alexandrite

• Izumrudnye Kopi (Emerald Mines) + Malyshevsky deposit; ~90 km NE of Yekaterinburg
• Phlogopite mica inclusions are most diagnostic feature for Ural provenance
• Cr³⁺ + V³⁺ chromophores; mica-schist host at granite contact
• See dedicated file: origin/russia/emerald

Russia is the world's largest diamond producer by volume (Alrosa company operations):

• Mir pipe (Mirny): Discovered 1955; one of the largest kimberlite pipes; ^[2]
  underground mining continues
• Udachnaya, Aikhal, Jubilee pipes (Nyurba field): Major modern producers
• Russian Yakutian diamonds show the standard kimberlitic inclusion suite
  (olivine/forsterite, pyrope garnet, chrome diopside, graphite); no unique
  macro-diagnostic features distinguish them from other kimberlitic origins
  at the gemmological bench level
• Separation from HPHT or CVD synthetic diamond uses standard spectroscopic
  methods; origin determination of individual natural diamonds is not routinely
  possible