Until recently, only emerald, ruby and sapphire were officially called precious gems. Everything else was called semi-precious. The precious categorization is a reference to value: a really fine ruby, ...

Peter Buck, a nuclear scientist who made millions as co-founder of the Subway sandwich chain, has given the Smithsonian's National Museum of Natural History a rare 23.1-carat ruby in memory of his ...

It's July, and if you have a birthday this month, the ruby is your birthstone. Rubies have been called the "king of gems," symbolizing strength, power and love. And they don't come cheap.You can buy ...