Diamonds are expensive because they’re rare, but high-end jewellers are increasingly embracing colourful alternatives like aquamarines, garnets and tsavorites for added sparkle Breaking news: ...

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, ...

On a site on Carlisle in Cumbria, England, that once held a high-status Roman bathhouse, archaeologists have unearthed 34 gems, variously cut from amethyst, jasper, and cornelian, and dating back to ...