Hadean zircons
... that Australia has the earliest mineral grains of Earth's history in the form of Hadean zircons?
... that Australia has the earliest mineral grains of Earth's history in the form of <b id="mwWg"><a href="./Hadean_zircon" id="mwWw" rel="mw:WikiLink" title="Hadean zircon">Hadean zircons</a></b>?