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Grossular

Tsavorite

1967 – Discovered in Northern Tanzania close to the Kenyan border by Campbell R. Bridges. Mining the deposit wasn’t possible in Tanzania so Bridges crossed the border and found the green garnet in 1971 on Kenyan territory near the Tsavo national park. He started mining the deposit. Tiffany’s director Platt was paying attention and decided to market the new gemstone under the name Tsavorite.

Large Tsavorite Crystal.

Hessonite

This brownish-red to orange gemstone used to be referred to as cinnamon stone. It is found in Sri Lanka and Tanzania and minor deposits lie in Brazil, Pakistan, and Canada. Hessonites are typically riddled with crystal inclusions and may show a characteristic swirly effect.

Renaissance Revival Citrine and Hessonite Garnet Diamond and Enamel Necklace.

Gemological Information for Grossular Garnet

  
Color:Green: Tsavorite – Yellow, Brown and Orange: Hessonite
Crystal Structure:Cubic
Refractive Index:1.73 to 1.75
Durability:Good
Hardness:7.25
Family:Garnet
Similar Stones:Corundum, Chrysoberyl other Garnets
Treatments:None Known
Country of Origin:Sri Lanka, Africa, Brazil, Canada, India, U.S.

Grossular Garnet Care

  
Ultrasonic Cleaning:Safe
Steam Cleaning:Safe
Warm Soapy Water:Safe
Chemical Attack:Avoid
Light Sensitivity:Stable
Heat Sensitivity:Stable