Leibish & Co., unveiled its World of Colors guide for identifying fancy colored diamonds in New York Thursday (January 19). A day earlier, I spoke privately with Leibish Polnauer, the president and ...

During the Christmas shopping season, we were bombarded by ads from jewelry stores pushing diamonds. Some offered diamonds in different colors. How do they color or dye something as hard as a diamond?

A 37-carat diamond, half pink and half colorless, found in Botswana, intrigues scientists due to its two-stage origin and ...

Natural History Museum of Los Angeles County is bringing together rare colored gems never before seen in the United States inside the museum’s Gem and Mineral Hall in an exhibition titled “Diamonds: ...

An impeccable diamond coming up for auction takes pretty in pink to an entirely new level. The Eternal Pink Diamond, a 10.57-carat jewel, was fashioned from a 23.78-carat rough stone discovered in ...

When shopping for a diamond, whether for an engagement ring or a piece of fine jewelry, you’ll quickly encounter the term Four Cs—Cut, Color, Clarity, and Carat Weight. These four characteristics ...

Deformation, impurities, radiation — many factors lend unexpected color to a diamond. By C. Claiborne Ray A. In diamonds, unexpected colors may arise in a variety of ways. These include small and ...

Tsukuba, Japan - Researchers from the Department of Applied Physics at the University of Tsukuba demonstrated second-order nonlinear optical effects in diamonds by taking advantage of internal color ...

Researchers showed that diamonds with color center defects can act as nonlinear optical materials for second-harmonic photon generation. This discovery can pave the way for completely light-based ...