Diamonds are famous for their strength, but scientists have long suspected that another form of diamond might be even harder.

Researchers have synthesized millimetre-scale hexagonal diamond, a crystal structure so elusive that many physicists doubted ...

Scientists created a pure hexagonal diamond in the lab, confirming a long-debated carbon structure slightly harder than ...

Chinese scientists claim to have created the long theorised hexagonal diamond, stronger than the real thing, and only found ...

After decades of debate, researchers say that they have found the clearest evidence yet for this rare form of carbon ...

A Chinese research team has produced bulk hexagonal diamond, a crystal structure long theorized to be harder than ...