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 ...

Before the 15% export tariff, Gemfields suspended production at Kagem, citing market saturation from discounted emeralds.

Zambia, together with Brazil and Colombia, are the world’s largest exporters of emeralds. As Zambia has ramped up taxes for emerald miners in the country, Brazil’s aggregate tax on revenues ...