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Ca3 A12(SiO4)3 The colorless or green, yellow, brown, or red end member of the garnet group, often occurring in contact-metamorphosis impure limestones. Also known as gooseberry stone; grossular.
a mineral of the garnet group. Chemical composition, Ca3 Al2 (SiO4)3. Colorless to yellow-brown or green, hardness on the mineralogical scale, 6.5–7.0; density, 3,530–3.600 kg/m3.