Birthstone Friday: Lab-Grown Emeralds

14k yellow gold pendant, set with pear-shaped Chatham-created emerald and small diamond. Courtesy VerbenaPlaceJewelry.com.

Emeralds are some of the most beloved gemstones in the world—especially by those whose birthdays are in May. However, richly colored, unflawed or lightly flawed emeralds are difficult to find and very expensive when they are found. So it was only natural that someone would try to do better than Mother Nature. In the 1930s, Carroll Chatham succeeded. Other growers soon followed.

As they grow in the earth, emeralds are subject to temperature changes, intense pressures, and impinging hot liquids that can burn, melt, crush, or corrode the stones. Violent mining methods don’t help. As a result, many mined emeralds come from the ground with a number of inclusions and fractures that can not only dull the beauty of the stones, they can weaken the stones as well. In fact, emeralds can be notoriously difficult to cut and set if they are badly included.   Continue reading