Inspired fashioning showcases mobile inclusions in a polished quartz specimen, reminiscent of an hourglass.

Natural opal beads displaying vibrant play-of-color are strung together to create a remarkable necklace.

Analyzes a group of 23 freshwater “Edison” pearls (a trade name referring to near-round freshwater cultured pearls, usually shell bead cultured) using various gemological and advanced instrumental techniques.

Using customized, image-based measurement systems to quantify the effect of fluorescence on the color, brightness, and transparency of gem diamonds viewed in both face-up and table-down orientations.

Documents Namak Mandi’s transformation from a salt market to one of Pakistan’s primary gem trading centers, with a look at the commercial activities taking place today.

A CVD laboratory-grown diamond with a fraudulent GIA inscription is submitted to the Antwerp lab.

Provides criteria for detecting the resin filling of turquoise, an advanced treatment that reduces porosity and can dramatically improve appearance and stability.

Two cabochons displaying white four-rayed “stars” are fashioned from one large natural diamond crystal.

Presents a method for accurately predicting the color of a gem material when viewed in any direction as long as the polarized spectra and the viewing angle relative to the c-axis are known.

A rare chatoyant effect is produced within play-of-color patches in a natural opal.