Mineral First Discovered at Barringer Crater

Crystal structure of lonsdaleite (hexagonal diamond) from WikiMedia

In 1967 a new diamond-hard mineral was discovered at the Barringer Meteorite Crater. It is named lonsdaleite, after the first female crystalographer of the Royal Society of London, Kathleen Londsdale.

After 55 years of study, it has recently been confirmed as a new mineral, while similar, distinct from diamond!