Diamonds are famous for their strength, but scientists have long suspected that another form of diamond might be even harder. Evidence of this was gathered over the past sixty years in meteorite ...

Diamonds are forever, and they’re also everywhere: in exoplanets, in meteorites, in your mother’s wedding ring. Some, though, are far more exotic than what you’d find in your local mall’s Swarovski.

Diamonds created by an interstellar collision of a dwarf planet and an asteroid could lead to the development of new super-hard materials for tools and production, researchers say. Rare lonsdaleite ...