Uvarovite Garnet | Gemopedia

Uvarovite is a highly desirable, yet widely unknown garnet species. Discovered in the 1830's in Russia, it was named in honor of Count Sergey S. Uvarov, a 19th century Russian statesman, scholar and avid mineral collector. Especially prized by collectors, uvarovite is hard to find anywhere, especially in sizes greater than 0.25 carats. Uvarovite ranges in color from medium to dark green and is best known for its granular, drusy masses which reveal well-formed dodecahedral or trapezohedral crystals under magnification.
Colors
Green, Yellow Green To Brownish Green

Uvarovite Garnet Classification

Common Name

Uvarovite Garnet

Species

Uvarovite

Variety

Uvarovite Garnet

Colors

Green, Yellow Green To Brownish Green

Alternate Names

Gemstone Groups

Garnet

Key Separations

Appearance

Comments

Uvarovite garnet occurs as irregular aggregates of small tightly packed crystals on a rock matrix and has crystals to tiny to test RI.

Uvarovite Garnet Optical Properties

Transparency

Opaque

Refractive Index

Over the Limit 1.798-1.864

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Singly Refractive (SR)

Fluorescence

SWUV: Variable
LWUV: Variable

CCF Reaction

Pleochroism

None

Dispersion

Strength: weak fire Value: 0.014

Comments

Uvarovite Garnet Chemistry & Crystallography

Chemical Name

calcium chromium silicate

Chemical Formula

Ca3Cr2(SiO4)3

Synthesis

Crystal System

Cubic

Classification

Silicate

Nature

Natural

Crystallinity

Aggregate

Comments

Uvarovite Garnet Characteristic Physical Properties

Hardness

6.5-7

Streak

White

Specific Gravity

3.71-3.81

Toughness

Inclusions

Luster

Vitreous

Stability

Fracture

Conchoidal, Uneven

Cleavage

None

Comments

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