Ca₂Mn₇Si₁₀O₂₈(OH)₂.5H₂O

This sample of inesite is displayed in the Smithsonian Museum of Natural History. Inesite is a silicate mineral with the composition Ca₂Mn₇Si₁₀O₂₈(OH)₂.5H₂O. The sample at left is about 20 cm across and is from Broken Hill, New South Wales, Australia. It is described as inesite with apophyllite.