Although spinel is rarely treated, there have been some heated spinels available in the trade.

Recently, a 23.67 ct pear cabochon aquamarine with light greenish blue color and poor clarity was sent to the Taiwan Union Lab of Gem Research (TULAB) for identification.

Careful comparison of two GIA reports reveals a fraudulent inscription on a laboratory-produced diamond presented as a natural.

Fura Gems hosted its first sales event for rough Mozambican rubies in August and September 2021.

Extensive analysis of early beads and pendants from archaeological sites in the French islands of the Lesser Antilles identified the objects as sudoite, which has never before been documented in any lapidary production.

This study examines FTIR spectra of yellow sapphire heat treated in an oxidizing atmosphere to deepen its color.

Reports on the geology, background, and current state of mining and production at Iran’s largest turquoise mine.

Provides a visual guide to GIA’s approach to classifying and describing pearls.

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

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.

A beautiful melo pearl is accidentally served up for lunch within its host gastropod.

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