As the name suggests, the emerald cut is the most common cut for emeralds. Courtesy Ronald Ringsrud Co.
Emerald crystal in white and smoky calcite from the Coscuez Mine in Colombia. Courtesy of Bill Larson. Photo: Robert Weldon/GIA
The emerald center stone of this necklace weighs 61 carats. Courtesy Ronald Lee Schultz.
This 10.03-carat stone is a trapiche emerald. Its inclusions form rays in a star-like pattern. This well-executed cabochon cut shows off this unusual arrangement. Courtesy Colombian Emeralds Co.
This 5.30-carat emerald from Brazil has a slightly bluish green color. Courtesy John Parrish, courtesy African, Brazilian, Colombian Gems Incorporated.
The 75.47-carat Hooker Emerald was worn by Ottoman Sultan Abdul Hamid II, the last sultan of the Ottoman Empire. Photo by Chip Clark, courtesy Smithsonian Institution, National Museum of Natural History.
A hand-held flashlight reveals the green color of a rough emerald from the Coscuez Emerald mine in Colombia. Photo by Eric Welch/GIA.
Emeralds set in jewelry have lasted for centuries. With the proper care, the emeralds in today’s jewelry will do the same. Courtesy Color Masters.
Figure 3. When the doublet was viewed under crossed polarizers, different optical orientations were apparent. At this angle, interference colors along the optic axis are clearly visible in the bottom portion but not the top. Photo by Claire Ito; field of view 11.60 mm.
Figure 2. Left: Flattened gas bubbles are visible along the separation plane of the doublet. Field of view approximately 3 mm. Right: Viewed under long-wave UV light, the doublet displayed strong red fluorescence in the top portion but not the bottom. A distinct boundary between the two parts is clearly visible. Photos by Ahmadjan Abduriyim.
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