Ilvaite
 | CaFe3O(Si2O7)(OH)4This sample of ilvaite is displayed in the Smithsonian Museum of Natural History. Ilvaite is a silicate mineral with the composition CaFe3O(Si2O7)(OH)4. The sample at left is about 10 cm across and is from Seriphos Island, Cyclades, Greece. |
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This pair of ilvaite samples is from Laxey mine, South Mountain, Idaho. The larger sample is about 8 cm across. |  |
 | This sample is ilvaite with quartz and is from Dalnegorsk, Primorskiy Kray, Russia. It is about 15 x 25 cm. |
| Minerals |
| Geophysics |