Since seizing power in August 2021, the Taliban have signed deals with numerous investors to mine gemstones, gold, copper and ...

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 ...

The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...