Most diamonds found in nature and often used in jewelry display a cubic crystal structure, a repeating pattern of 8 atoms forming a cube with carbon atoms at its vertices.

The stable form of carbon at room temperature is Graphite which has a hexagonal crystal structure. (Top diagram) Diamond is metastable at room temperature and has a diamond cubic crystal structure.

The diamond structures were locked inside the Canyon Diablo meteorite, which slammed into Earth 50,000 years ago and was first discovered in Arizona in 1891. The diamonds in this meteorite aren't ...

Diamond has long been regarded as the practical and theoretical hardness champion and has found uses ranging from industrial abrasives to a girl's best friend. Cubic boron nitride, a synthetic ...

Natural diamonds have a cubic crystal structure, and while six-sided or hexagonal diamonds have been found rarely in nature (like at the site of meteorite impacts), creating them in a lab has ...

Like diamond, lonsdaleite is made up of carbon atoms, but they are arranged into a hexagonal crystal structure instead of a cubic one. "Lonsdaleite is very puzzling," Asimow told Live Science.

Although the team probed carbon structures at unprecedented pressures of around 2,000 gigapascals (about 5 times the pressure found at Earth’s core), the crystal structure remained in a diamond ...

The differing properties of carbon and diamond arise from their distinct crystal structures. In a diamond, ... Graphite also has a lower density (2.266 grams per cubic centimeter) than diamond.

New research suggests it contains never-before-seen diamond crystal structures. (Image credit: Terryfic3D/Getty) ... The carbon atoms within these diamonds are arranged in cubic shapes.