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 ...

Nitrogen-vacancy centers -- flaws in a diamond's crystal lattice that produce color -- have received much attention for their sensitivity to magnetic fields. Researchers have now used N-V diamond ...

Jeweler Harry Winston donated the famous Hope Diamond—the largest-known deep blue diamond in the world—to the Smithsonian Institution in 1958. It arrived in a plain brown package by registered mail, ...

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 ...

Jeweler Harry Winston donated the famous Hope Diamond—the largest-known deep blue diamond in the world—to the Smithsonian Institution in 1958. It arrived in a plain brown package by registered mail, ...