The Smithsonian's National Museum of Natural History acquired one of the world's rarest gemstones.Natural red diamonds are some of the rarest gems on Earth, and the Winston Red Diamond is exceptional ...

"If you look at a top-quality, gem quality ruby versus the top quality of a diamond – let's say they're five carats each – the ruby is going to be much rarer and much more expensive than that ...

Jewels, birthstones, gemstones—so many names for the glitzy, glamorous stones so many of us love to wear each and every day. This got us thinking: Is there a difference between jewels and gems? To ...

A new way to improve the color, clarity and luster of rubies has been tested by scientists: put them in the microwave. Rubies are among the world's most popular precious gemstones, and are also used ...