Hessonite is a gem quality variety of grossularite (grossular) garnet, the calcium-aluminum silicate member of the garnet species. While most varieties of grossularite are green, hessonite is known for its characteristic honey-yellow to brown-red 'cinnamon' color, though it can occur in other colors as well. It is referred to as the 'cinnamon stone' or the 'kaneel stone' in reference to its distinct color. Other types of grossular garnets include the more common green grossularite, chromium-rich tsavorite, the rare hydrogrossular garnet and the rare leuco garnet (colorless).
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