The most popular emeralds are a bluish or pure deep green. This green does not have an overly dark tone. Within high quality emeralds, the color is evenly distributed throughout the gemstone. Emeralds from different mines and countries can have a differing colors as well. Emeralds from Colombia have a pure intense green color. Those from Zambia have a blueish tinged green color. However, these factors are not a guarantee of the sourcing of the gemstone. Emeralds that have a saturated and darker green are more valuable. Those that look pale or have a more icy green look are considered less valuable. In fact, those that are very light are classified as green beryl. Emeralds that do not contain more than 15% of a secondary color are considered premium and demand a much high price.