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Article: Tsavorite


Characteristics of Tsavorite

  • Tsavorite is a variety of the garnet group species grossular.
  • It has a specific gravity of 3.60-3.68.
  • Tsavorite has a refractive index of 1.740.
  • The dispersion of tsavorite is 0.028.
  • Trace amounts of vanadium or chromium provide the green color.

Discovery and Mining

  • Tsavorite was discovered in the mountains of Simanjiro District, Tanzania in 1967.
  • British gem prospector Campbell R. Bridges made the initial discovery.
  • Bridges later found tsavorite in Kenya and was granted a mining permit.
  • Tiffany and Co launched a marketing campaign in 1974 to promote tsavorite.
  • Bridges was murdered in 2009 due to a dispute over access to his gemstone mines.

Geographical Distribution

  • Tsavorite is found in Manyara, Tanzania and Toliara Province, Madagascar.
  • Small deposits of gem-grade material have been found in Pakistan and Antarctica.
  • No other occurrences of gem material have been discovered.
  • Tsavorite is rare in gem-quality over several carats.
  • Large tsavorite crystals, such as a 925-carat and a 120.68-carat, have been found.

Notable Tsavorite Stones

  • The Lion of Merelani is a square cushion cut tsavorite weighing 116.76 carats.
  • It has 177 facets and is on display at the Smithsonian Institution.
  • A 325-carat oval mixed-cut tsavorite stone is one of the largest in the world.
  • Tsavorite formed in a Neoproterozoic metamorphic event, resulting in various inclusions.
  • Inclusions are strong identifying features in tsavorite.

References and External Links

  • Bancroft, Peter. Tsavorite. Pala International.
  • Tsavorite.
  • Tsavorite. International Colored Gemstone Association.
  • BBC News. Mob kills UK gems expert in Kenya.
  • Arem, Joel E.; Clark, Donald. Tsavorite Garnet Value, Price, and Jewelry Information.
  • Daily Telegraph obituary for Campbell R. Bridges.
  • Tsavorite Garnets Used in Celtic Jewelry.
  • Wikimedia Commons has media related to Tsavorite.
  • List of emeralds by size.
  • List of sapphires by size.

Tsavorite Data Sources

Reference URL
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