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Colombian Emeralds

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Emerald Treatments

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If you are not a gem or jewelry enthusiast, you may be surprised to learn that many gemstones are enhanced in some way or another. From diamonds, rubies, sapphires, and on down to 'lesser' stones, treatments are quite common. The types of treatments and the reasons for treating a stone are very dependent on the classification of the stone. Some estimates suggest up to 95-99% of all emeralds are treated.

Most are treated to improve the passage of light within stone. The physical makeup of the emerald crystal, with its tiny natural fissures simply makes it logical to do so. As is the case with most gems, the stone's natural properties dictate which enhancements are acceptable and which are not. A perfect example of this would be the heat treatment of tanzanite.

Before heating, tanzanite is a brownish color, but turns a permanent blue or purple color after heating. The enhancement method is accepted because no foreign coloring agents were introduced, the method is common practice, and it is generally fully disclosed to the buyer.

Some treatments used on emeralds include:


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