U.S. Holiday Closure
The Carlsbad and New York laboratories and campuses will be closed on Monday, February 15 in observance of the President's Day holiday. These locations will resume regular business hours on February 16.

featured Research & News

Chandra Horn
Feature Article

Tips, Tools to Evaluate Diamond Rough

Guest speaker Chandra Horn shares the challenges, tools to evaluate the quality of rough diamonds.
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Red heart-shaped pyrope inclusion in diamond.
Micro-World

Red Heart Inclusion in Diamond

Although some would call them flaws, many think of inclusions as Mother Nature’s artwork or fingerprint. 
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Natural red and synthetic orange rutile
GEM News International

Natural Faceted Red Rutile

A dark red stone is revealed to be natural red rutile, the first faceted specimen seen in the Carlsbad lab.
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Feature

Super Bowl Rings: A Gallery of NFL Championship Rings

The Super Bowl is the most popular sporting event in the United States – almost 110 million Americans watched in February 2015. So it’s not surprising that the Super Bowl ring is a matter of serious interest.
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Industry Analysis

January Outlook: Rough Supplies Up, Prices Down

Soft prices and excess inventory of 2015 helped by holiday season sales. Plus: China retail report.
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