To enjoy a different green from that of Colombian emerald, or when looking for an oval- or pear-shape cut, one should purchase a stone whose beauty will not diminish over time by choosing from gem quality, or at least jewelry quality. Barring a few exceptions, Colombian stones, with their superior beauty, would be more appropriate for center stones in jewelry priced over $ 10,000.The value of a one- carat-size Zambian emerald of jewelry quality is approximately US $2,500 for the stone alone. (2004)

The price shown on pages 34, through 41, and the above-mentioned value, are based on emeralds that have been lightly treated with oil. Emeralds that have undergone severe treatment with oils or resins will appear beautiful at first glance, but they may have drastically lower prices, so caution is advised.