noun a rare magnetic mineral, manganese iron oxide, MnFe2O4, similar to magnetite.
jacobsite 🔊 Listen to this noun a rare magnetic mineral, manganese iron oxide, MnFe2O4, similar to magnetite. Jacobsita – Wikipedia, la enciclopedia libre Jacobsite – Wikipedia Jacobsite Mineral Specimen For Sale Jacobsite Mineral Specimen For Sale Jacobsite with Calcite and Andradite. | Opals and Other Gemstones Jacobsite Mineral Specimen For Sale Share Facebook Twitter Google +