Above: A hexagonal (six-sided) snow crystal, classified as a stellar dendrite. This crystal was photographed with an Olympus TG-6 camera after it landed on the sleeve of the authors fleece jacket.

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 ...

Chinese scientists have developed a super diamond, an ultra-hard material with a hexagonal crystal structure (lonsdaleite), making it 40% harder than natural diamonds. This breakthrough holds immense ...

To synthesize the crystals, the team compressed highly ordered pyrolytic graphite to pressures as high as 20 gigapascals, roughly 200,000 times the atmospheric pressure at Earth’s surface.

Add Yahoo as a preferred source to see more of our stories on Google. Scientists report creating pure hexagonal diamond, resolving a long debate about the rare meteorite mineral lonsdaleite. (CREDIT: ...

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 ...