Superior Emeralds such as these are obvious in their brightness and can hardly be taken for anything other than high quality Emerald gemstone. These 2.75mm round matched Emeralds are of Zambian origin; when nice like this pair, the Zambian Emerald has a very pleasing brightness in the green.
Most of the world production of Emerald gemstone comes from Colombia, and the Colombian Emerald has definite cachet, for historically certain mines in Colombia have produced some of the very best Emerald material over the past fifty-odd years, but the brightness of good Zambian Emerald stands well in comparison. ( And then there is the physical problem of Colombia, with the whiff of danger about the business of trading in Emerald there. )