Most premium emeralds come from Colombia, but they've been found in Russia and the U.S. as well. The Rockefeller emerald is ...

From hardness and value to symbolic meanings, ... Similarly, the formal emerald trade has been operating since Spanish conquistadors in the 16 th century were transporting emeralds on their voyages.

They have a hardness rating of 7.5 to 8, so diamonds and sapphires would scratch them, and the stone may need to be polished over the years. Emerald Like aquamarine, emeralds come in at about 7.5 ...