A Matryoshka diamond, the first of its kind, was discovered in a diamond mine in Russia. An air pocket nestled inside the diamond contains an even tinier diamond that rattles when shook. Scientists ...

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For centuries, diamond has been the reigning champion of hardness on Earth. However, a recent breakthrough in material science has led to the synthesis of a new substance, predicted to be 50 percent ...

Diamond stands up to a squeeze. Surprisingly, the material’s structure persists even when compressed to 2 trillion pascals, more than five times the pressure in Earth’s core, scientists report January ...

Chinese scientists have developed a tough diamond-carbon nanotube composite. Could materials like this eventually help make space elevators possible? Here's what scientists made.