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Tsavorite

Garnet

By Tim Matthews, JD, FGA, GG, DGA,
CEO and President of JTV (retired)
Published: June 2014
Modified: September 2023
Tsavorite Polished Tsavorite Rough Tsavorite Jewelry
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Table of Contents
  • General Information
  • Tsavorite Colors
  • Countries of Origin
  • History
  • Care

Tsavorite is an attractive green variety of grossular garnet. It was discovered in northeastern Tanzania in 1967 by Campbell Bridges, a British geologist. A second find four years later in Kenya led to the opening of the first commercially viable mine in 1974. Tsavorite gets its name for the near by Tsavo River and the Tsavo National Game Reserve. The color of the stone can be a rich pure green, a yellowish green or bluish green. The color is due to the presence of trace amounts of vanadium and chromium.

General Information

  • Classification
  • Optical Properties
  • Characteristic Physical Properties
  • Chemistry & Crystallography
Common Name
Tsavorite
Species
Garnet
Transparency
Transparent - Semitransparent
Dispersion
Strength: Moderate Fire Value: 0.028
Refractive Index
1.740-1.740
Tolerance:(+0.020/-0.010)
Optic Character
NA
Optic Sign
NA
Polariscope Reaction
Singly Refractive (SR) With ADR
Fluorescence
SWUV: inert to weak yellow-orange
LWUV: Inert to weak orange or yellow orange
CCF Reaction
Some stones may appear pink or red
Pleochroism
None
Hardness
7-7.5
Streak
None
Specific Gravity
3.570-3.730 Range:0.12/-0.04 Typical:3.610
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, Greasy
Stability
Good
Fracture
Conchoidal, Uneven, Irregular
Cleavage
None
Chemical Name
calcium aluminum silicate
Chemical Formula
Ca3Al2(SiO4)3
Crystal System
Cubic
Chemistry Classification
Silicate

Tsavorite Colors

  • Green Tsavorite
    Green
  • Green Tsavorite
    Green
  • Green Tsavorite
    Green
  • Green Tsavorite
    Green

Countries of Origin

Tanzania, United Republic Of; Afghanistan; Russian Federation; Mozambique; Unknown; Brazil; Madagascar; Kenya; Thailand; India

History

Tsavorite is one of the least-known and most under-valued of all gemstones. Its color rests at the pinnacle of the greens. What makes tsavorite so desirable? Combine that lush green color with exceptional clarity, stir in a hardness that makes it ultra-wearable and then add the indefinable... that certain something that seems to burn within the stone. It's a golden-green light, an icy-green fire that draws you. January babies, what a birthstone! Tsavorite will make your friends green with envy. As we said, be ready to be mesmerized...

Care

Clean your tsavorite in warm, sudsy water, rinse and dry thoroughly. Avoid harsh chemicals as well as ultrasonic and steam cleaners.

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