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

Add Yahoo as a preferred source to see more of our stories on Google. Kwangmoozaa via Shutterstock You don't need a diamond detective to keep you from getting scammed at the jewelry counter. If you're ...

An international research team has produced a bulk, millimeter-scale hexagonal diamond in the laboratory, a crystal variant long theorized to rival or exceed the hardness of the cubic diamonds found ...

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