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Articles

Colombian emeralds can command premium prices. Jeffery Bergman separates emerald myth from fact when it comes to determining the origins of these…

How do lapidaries decide what gemstone shape to cut? Learn how inclusions, rough, orientation, and other factors can influence that decision.…

Rare chrome tourmaline can show an emerald-like green color. With a highly desired color and tourmaline’s excellent qualities as a jewelry stone,…

Cutting tourmaline can be difficult. Some gems seem to shatter easily. Learn faceting techniques to minimize this risk as well as what equipment…

Identifying gemstone treatments is difficult even for experienced gemologists. Learn about the many different ways gem color and clarity are…

The color grading standards for white diamonds don’t apply to fancy colored diamonds. Learn the GIA and Argyle grading systems and how to find signs…

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