The document is signed by Christoph Köchert, whose family long served as jewelers to the imperial court.

A legendary jewel of the Hapsburg dynasty — not seen since 1919 and thought lost, stolen or recut — has actually been safe in ...

De Beers and Endiama discover a new kimberlite deposit in Angola, the first in 30 years, changing the global diamond map.

Scientists have upended long-held assumptions about thermal conductivity, revealing that boron arsenide crystals can conduct heat even better than diamond. Researchers at the University of Houston ...

Strontium titanate’s remarkable ability to perform at extremely low temperatures makes it a key material for next-generation cryogenic devices used in quantum computing and space exploration. Supercon ...