The world’s most expensive substances command their prices for very different reasons. Some, like rare gemstones, are ...

When someone says “gemstone,” diamonds and rubies probably pop into your head first. There’s no denying that they’re rockstars of the jewelry world. However, apart from them, there’s a whole lineup of ...

Diamonds and emeralds might dominate the limelight, but there exists a world of gemstones so rare and valuable that they are the stuff of legends. What exactly makes a gemstone rare and valuable? It's ...

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 ...

Walking into a jewelry store usually means seeing the same lineup of diamonds, gold, and maybe some sapphires if you’re lucky. Precious metals and classic gemstones have dominated the market for ...

A Carthage man may have unearthed one of the rarest gemstones in the world — not in a mine, but in his own front yard. Robert Lewis Jr. says he found an unusual black rock just steps from his home ...

Across the hills of Kenya and Tanzania, two gemstones capture the continent’s natural brilliance and enduring mystique: Tanzanite and Tsavorite. Both discovered within a few years of each other in the ...