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 Roman bust of a mythical maenad reveals Indian garnet eyes, offering new evidence of Indo-Roman trade networks and gemstone exchange.

Synthetic gem-crystals are available since the late 1800s and their production processes were more and more refined. Later, starting in the 1950s, diamond was available via different types of ...