Ferroaxinite
| Ca2FeAl2(BO3OH)(SiO3)4
These samples of ferroaxinite are displayed in the Smithsonian Museum of Natural History. Ferroaxinite is assigned the general formula Ca2FeAl2(BO3OH)(SiO3)4. This sample is from Switzerland. The sample size is about 5 cm.
The ferroaxinite gems are 23.6 and 9.3 carats and are from Baja California, Mexico.
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The sample at left is about 12x15 cm and is from Toruku mine, Miyazaki, Japan. It is classified as ferro-axinite with danburite. The sample above is about 7x 5 cm and is from Obira mine, Oita, Japan.
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| This sample at right is ferro-axinite with prehnite. It is about 9x9 cm and is from Riverside, California.
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This sample is about 12x10 cm and is from Puiva, Tyumen Oblast, Urals, Russia. It is classified as ferroaxinite with calcite.
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| This sample is from Vitoriado Conquista, Bahia, Brazil . The sample size is about 5 cm.
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Mindat: Ferroaxinite
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