gemmology.dev – Ural Emerald – Malyshevsky, Russia

Introduction

Ural emerald from the Malyshevsky deposit (also Izumrudnye Kopi – "Emerald Mines")
has been mined since discovery in 1831. Located approximately 90 km northeast of
Yekaterinburg in Sverdlovsk Oblast, this is the same contact zone that produces
Russian alexandrite. The deposit occupies the contact between granitic pegmatites
and Cr-enriched mica schists. Russian emeralds are identified primarily by their
characteristic phlogopite mica inclusions.

Geological Setting

Ural emerald genesis:

Host rock: Phlogopite mica schist at the contact with granitic intrusions;
Laskovenkov and Zhernakov (1995) confirmed that the deposits consist of
"mica schists with phlogopite" along the Tokovaya River corridor
Genetic model: Same as alexandrite – pegmatite supplies Be and Al;
Cr-enriched ultramafic/schist country rock supplies Cr; the intersection
of these sources at the contact zone enables beryl + Cr emerald formation
Deposit scale: Malysheva mine is the largest known emerald deposit in Russia;
operated intermittently in the post-Soviet period

Properties

Property	Value
Formula	Be₃Al₂Si₆O₁₈ (beryl), Cr³⁺ + V³⁺ colouring
Crystal system	Hexagonal; uniaxial negative
RI	1.577–1.583 (ω); 1.584–1.590 (ε); DR ~0.006–0.009
SG	2.72–2.77
Hardness	7.5–8 (Mohs)
Chromophores	Cr³⁺ (primary) + V³⁺ (secondary)
Fluorescence (LWUV)	Moderate red to orange-red; stronger than Colombian
Chelsea Colour Filter	Red (Cr³⁺ dominant)
Key absorption	680 nm Cr doublet (strong); 637 nm; 477 nm; 430 nm cutoff

Diagnostic Inclusions

Russian Ural emerald inclusion suite:

Primary Diagnostic – Phlogopite Mica

Phlogopite mica flakes: Brownish, tabular platelets parallel to the
cleavage planes; the most characteristic and diagnostic inclusion for Ural
emerald origin
These mica platelets derive directly from the phlogopite mica schist host rock
Their brownish tabular habit distinguishes them from the calcite and pyrite
of Colombian emerald and from the tremolite needles of Sandawana (Zimbabwe)

Additional Inclusions

Tremolite needles: Calcium-magnesium amphibole; slender, colourless
Two-phase fluid inclusions: Liquid + gas
Actinolite
Apatite: Rounded crystals
Pyrite: Present but less abundant than in Colombian material

Chromophore Profile

Cr³⁺ + V³⁺ in Ural emerald:

Both Cr and V are present as colouring agents; this dual chromophore profile
gives a colour profile slightly different from purely V-dominated Brazilian
(Itabira/Carnaíba) material and from the high-Cr Sandawana
Compared to Colombian: less fluorescence (more Fe present); different colour
profile (Ural green tends toward warmer medium green rather than Colombian's
vivid pure green)
Compared to Zambian: similar Cr+V but different inclusion suite (Zambia has
biotite, not phlogopite; distinct talc and chlorite inclusions)

Origin Discrimination

Feature	Ural (Russia)	Colombian (Muzo)	Sandawana (Zimbabwe)	Zambia
Primary inclusion	Phlogopite mica platelets	Parisite + halite in 3-phase	Tremolite needles	Biotite mica platelets
Pyrite	Present (minor)	Absent in Muzo; abundant in Chivor	Absent	Present
Chromophore	Cr + V	Cr dominant	Cr dominant (very high)	Cr + V
Fe content	Low	Very low	Very low	Moderate
Fluorescence (LWUV)	Moderate red–orange	Strong red	Very strong red	Moderate red
Li content	>200 ppmw (higher)	<200 ppmw	>200 ppmw	>200 ppmw

Market Notes

Ural emerald market position:

Below Colombian in prestige and price; quality is variable; fine material is
attractive but Ural production does not achieve the colour saturation of top
Colombian or Sandawana
Malysheva deposit operates intermittently; supply is not continuous
Russian emerald is prized by collectors for its historical interest and
characteristic mica inclusions