From a Persian prince to the American “jeweler to the stars,” the world’s largest cut blue diamond has a lengthy history.

Gemstones are valued based on the Four Cs - color, clarity, cut, and carat. Precious stones include diamonds, sapphires, rubies, and emeralds. Semi-precious stones are evaluated on their rarity and ...

“Crystallized ruthenium is a material not widely used in the industry,” Mr. Béchu said, although his brand has used it on ...

GIA’s laboratories use advanced instrumentation and research to deliver accurate grading, identification, and origin ...

Scientists introduced atomic defects in spinel using cerium, and voilà! The gemstone became a solid qubit system.

A surge in the popularity of lab-grown diamonds is sending shock waves through the traditional precious gems industry.

Dewdrop-shaped diamonds at Boucheron, fish brooches with iridescent scales at Van Cleef & Arpels, flowers with pink sapphire ...

Collapsing diamond prices are doing more than frustrate plans to sell industry leader De Beers, they are becoming the latest headache for Russia.

American jewellers report that lab-grown diamonds now account for more than ... and foresee a future filled to the brim with lab-grown gems. And for other kinds of products they would be correct.