Definition of ilvaite in US English:



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

    • ‘Conditions of ilvaite formation and factors responsible for its concentration pattern in different ore bodies and deposits are discussed.’
    • ‘As the first snowflakes of the season were falling, I bought a nice thumbnail of ilvaite on hedenbergite for only $10!’
    • ‘Several smaller ilvaite crystals and some associated quartz crystals fill out the rest of this wonderful display piece.’
    • ‘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.’
    • ‘The next shots are of the pematite mineral shot - a morganite and then hematite and ilvaite specimens which are also found on Elba Island.’


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