| CaB3O3(OH)5.H2O
This sample of inyoite is displayed in the Smithsonian Museum of Natural History. Inyoite is a oxide mineral of boron with calcium (a borate). Its composition is CaB3O3(OH)5.H2O. The sample at left is about 10 x 30 cm and is from Sorpresa, Pastos Grandes, Salta, Argentina.
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