Colombia produces the world’s most expensive emeralds. The highest-quality stones can be worth tens of thousands of dollars per carat. Miners have fought over these treasures for centuries, but in the ...

GIA’s laboratories use advanced instrumentation and research to deliver accurate grading, identification, and origin ...

A new report from coloured gemstones miner Gemfields on the emerald, ruby and sapphire markets “… serves as a reminder of how far the coloured gemstone industry still has to go to reach the levels of ...

Even though emeralds and rubies are very different colors, they both have the same secret ingredient in their atomic ...