Tsavorite Garnet | Gemopedia

Tsavorite is one of two green varieties of garnet, though arguably the more important of the two. Especially in smaller sizes, tsavorite creates competition for emerald because it is less included, rarely treated and more durable. Like some emerald and green tourmaline, tsavorite garnet owes its green hues to the presence of vanadium and chromium. First discovered in Tanzania in 1967 and a few years later in Kenya, tsavorite's name pays homage to the nearby Tsavo National Park.
Colors
Intense Green To Yellowish Green, Bluish Green

Tsavorite Garnet Classification

Common Name

Tsavorite Garnet

Species

Grossularite

Variety

Tsavorite

Colors

Intense Green To Yellowish Green, Bluish Green

Alternate Names

Gemstone Groups

Garnet

Key Separations

refractive index, singly refractive nature, possibly magnification and fluorescence

Comments

Tsavorite is a variety characterized by a medium to dark green or yellowish green body color.

Tsavorite Garnet Optical Properties

Transparency

Transparent - Semitransparent

Refractive Index

1.74-1.74
Tolerance:(+0.020/-0.010)

Birefringence

0-0

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Singly Refractive (SR) With ADR

Fluorescence

SWUV: weak yellow-orange
LWUV: Inert to weak orange

CCF Reaction

Some stones may appear pink or red

Pleochroism

None

Dispersion

Strength: moderate fire Value: 0.028

Comments

Tsavorite Garnet Chemistry & Crystallography

Chemical Name

calcium aluminum silicate

Chemical Formula

Ca3Al2(SiO4)3

Synthesis

Crystal System

Cubic

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Tsavorite Garnet Characteristic Physical Properties

Hardness

7-7.5

Streak

Specific Gravity

3.57-3.73 Range:0.12/-0.04 Typical:3.61

Toughness

Good

Inclusions

Tsavorite garnet is a Type II clarity stone. Stones will sometimes have feathers, fingerprint inclusions, needles, asbestos fibers and small graphite platelets.

Luster

Vitreous

Stability

Good

Fracture

Conchoidal, Uneven

Cleavage

None

Comments

Tsavorite Garnet
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