Kornerupine

Mg4Al6(Si,Al,B)5O21(OH)

This sample of kornerupine is displayed in the Smithsonian Museum of Natural History. Kornerupine is a silicate mineral which contains boron as well as aluminum and magnesium. It has the composition Mg4Al6(Si,Al,B)5O21(OH). The sample at left is about 12 cm across and is from Oure Mississippi, Fiskernies district, Greenland.

Mindat: Kornerupine

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