Definition of ilvaite in US English:



  • A mineral consisting of a basic silicate of calcium and iron, typically occurring as black prisms.

    • ‘Several smaller ilvaite crystals and some associated quartz crystals fill out the rest of this wonderful display piece.’
    • ‘Conditions of ilvaite formation and factors responsible for its concentration pattern in different ore bodies and deposits are discussed.’
    • ‘The next shots are of the pematite mineral shot - a morganite and then hematite and ilvaite specimens which are also found on Elba Island.’
    • ‘As the first snowflakes of the season were falling, I bought a nice thumbnail of ilvaite on hedenbergite for only $10!’
    • ‘There are exceptions, such as German manganite, some Bolivian and Chinese cassiterite, Russian ilvaite, Brazilian and Namibian schorl, Panasqueira ferberite, and rutile, especially that from Graves Mountain, Georgia.’


Early 19th century: from Latin Ilva ‘Elba’ + -ite.