Spessartine
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Spessartine is silicate of manganese and aluminum with the composition Mn3Al2(SiO4)3. This sample is about 3x3 cm and is from Gilgit, Northern Areas, Pakistan. These samples are displayed in the Smithsonian Museum of Natural History.
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Another example of the habits of formation of spessartine crystals comes from Garnet Hill, White Pine County, Nevada. The sample size is about 9x7 cm.
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Grossular
Grossular is silicate of calcium and aluminum with the composition Ca3Al2(SiO4)3. The sample at left is about 6x6 cm and is from Sandave, Nioro du Sahel, Mali. The sample at right is about 10x14 cm and is from La Calera, Cordoba, Argentina.
Andradite
Andradite is silicate of calcium and iron with the composition Ca3Fe2(SiO4)3. The sample at left is about 10x7 cm and is from San Benito County, California. The sample at right is about 6x9 cm and is from Marquakhel, Spinnatigga, Parchines, Pakistan.
Anorthite
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Anorthite is a silicate silicate of calcium and aluminum with the composition CaAl2Si2O8. This sample is about 8x11 cm and is from Monzoni, Val di Fassa, Trentino-Alto Adige, Italy.
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