What Makes an Emerald so Special?

Emeralds hold a unique distinction in the world of gemstones as they are one of the four traditionally considered to be precious. Along with diamonds, rubies and sapphires, the emerald has a long history as a sought after gem thanks to its unique green color and relative rarity. Emeralds belong to the gem family beryls – which are crystals of beryllium aluminum silicate that are colored by traces of different elements. What gives emeralds their seductive green color are traces of chromium. Lots of chromium while the gemstone is formed is what sets Colombian emeralds apart and gives them their striking green color.