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Cubic zirconia only forms under extreme temperatures, like those produced when an asteroid impacts Earth

By Neeraja Chinchalkar, PhD student, Earth and Planetary Science and Exploration, Western University
Gordon Osinski, Professor in Earth and Planetary Science, Western University
Timmons Erickson, Visting Research Associate, School of Earth and Planetary Sciences, Curtin University

Cubic zirconia, a popular diamond substitute, only occurs naturally under extreme conditions. Finding cubic zirconia in craters reveals parts of the Earth’s history.

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