It’s proposal season, and engagements are on the rise. So are factory-made diamond sales. Not that you’d know the difference. Man-made diamonds look the same as naturally occurring ones. The ...

The U.S. Air Force may soon be adding some serious bling to its aircraft, in the form of windows made from 80-carat diamonds.

Photos from a Singapore diamond lab reveal how it bakes up batches of stunning and real diamond gems in 10 to 12 weeks using high-tech plasma ovens. Business Insider Subscribe Newsletters ...