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Tsavorite
Gemstone
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Tsavorite or tsavolite is a variety of the garnet group species grossular, a calcium-aluminium garnet with the formula Ca₃Al₂Si₃O₁₂. Trace amounts of vanadium or chromium provide the green color. Wikipedia
Hardness (Mohs hardness scale): 7 – 7.5
Refractive index: 1.738 – 1.745
Chemical formula: Ca₃Al₂Si₃O₁₂
Color: Green
Crystal system: Cubic
Dispersion: 0.028
Formula (repeating unit): Ca3Al2Si3O12