A gemological investigation into natural moldavite and its more recent imitations.

The New York lab discovers synthetic moissanite in a colored diamond bracelet.

A report from the Second International Diamond School, held in Brixen, Italy in January 2015.

Review of Van Cleef & Arpels: Treasures and Legends, by Vincent Meylan.

An exciting find reveals a pocket of exceptionally large and lustrous royal blue sapphire crystals in a town already known for these beautiful gems.

Silver-set pieces created from pink thulite as well as blue slag material from the Middle Ages demonstrate Scandinavian diversity and artistry in jewelry design.

GIA Library director Robert Weldon is recognized by a professional organization for his long service in the field of gemology.

Intriguing bicolor sapphires and spectacularly colored thin sapphire slabs are produced by mines in Rock Creek and Inverell, respectively.

Fossilized specimens discovered near St. Petersburg, Florida, provide unique insights into ancient mollusks.

Mysterious fibrous inclusions displaying chatoyancy are discovered in an opal with probable Mexican origin.

RusGems creates striking synthetic bicolor gems using the flame-fusion technique.

Discovered in the Italian Alps, a new mineral species of tourmaline has been named for Dr. Barbara Dutrow in honor of her teaching and research contributions to the field.

A large, lustrous natural freshwater pearl was displayed by the American Pearl Company at this year’s AGTA show.

An untreated blue sapphire rough and a faceted light teal blue sapphire, both of exceptional quality, add to the long-running reputation of Rock Creek for producing beautiful gems.

An exhibit featuring replicas of extraordinary diamonds won GIA’s museum the top awards from two gemology and mineralogy professional groups.

When a coating is removed, a carved piece of jadeite jade reveals that it is actually a doublet incorporating the similar-looking material known as serpentine.