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

Oval engagement rings are a classic choice for a reason. We break down everything to know about the popular cut from its history to unique setting choices for the stone.

Atomic structure of the hexagonal diamond. Image from the study. Researchers named it lonsdaleite, after crystallographer ...

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