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Smithsonian National Museum of Natural History

Grossular (var. tsavorite)

No description of this
                                          asset is available
Photo by Ken Larsen. Click to zoom.
Catalog Number NMNH G10626-00
Locality GG1 Mine, Kenya
Weight 1.93 ct

Gift of Mr. Campbell R. Bridges in 2009.

Tsavorite is a highly prized gem variety of grossular garnet. It was first discovered by Campbell Bridges in 1967 near Kenya’s Tsavo National Park. This region on the Kenya-Tanzania border remains the only source of gem tsavorite. The most valuable tsavorites are an intense green to blue-green and can sometimes be confused with emerald; a yellowish overtone is less desirable. This tsavorite is cut en cabochon and weighs 1.93ct. The inclusions in this gem appear to be corrosion tubes that were replaced with iron oxide, hence the rust colored tube-like inclusions. Tsavorite is a totally natural gemstone. It is not heated, oiled, filled, irradiated, or treated in any way. This variety of green garnet was named tsavorite in honor of Kenya’s Tsavo National Park, by Henry B. (Harry) Platt, former President of Tiffany & Co., and Campbell Bridges, President of Tsavorite USA.


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