Details the process used by Wiede’s Carbidwerk to produce star synthetic corundum from the mid-1950s through the 1970s.

A fluorite specimen hosts two eye-visible, prominent white barite inclusions.

Summarizes statistical data and distinctive features of several thousand gem-quality HPHT synthetic diamonds examined by GIA from 2007 through 2016.

Garnets with a unique color and a previously unreported chemical composition are examined at GIA’s Carlsbad lab.

Compares PL spectroscopy data of 48 emerald samples from three countries to evaluate the usefulness of the technique in geographic origin determination.

Current activity and production at various sites around Mozambique are reported.

Examines 85 saltwater natural pearls, reportedly harvested from the Caribbean islands off the coast of Venezuela during the early 16th century, to determine their age.

A growth blockage/fluid inclusion combination in a blue sapphire from Sri Lanka resembles a bloom in a rainstorm.

A quartz cabochon hosts an unusual rose-shaped hematite inclusion.

A firsthand look at Colombia’s emerald mines and the cutting and trading industry in Bogotá.

Review of Taffin: The Jewelry of James de Givenchy, by James Taffin de Givenchy, Tobias Meyere, and Hamilton South.

Alumni across the globe participate in chapter events and are out in full force to support the trade. There are a variety of ways you can join them.

母親たちからインスピレーションを受けた卒業生のカップルが、美しいジュエリー、そして美しい人生を共にクリエイトします。

Nineteen sapphires of various colors, reportedly from sources in northern Nigeria, are studied in GIA’s Tokyo laboratory.

A specimen seen in the Carlsbad lab for an updated diamond grading report does not match the previous documentation.

色だけで宝石を判断しないよう気を付けてください。同じような色の宝石を識別するのに使える手がかりはたくさんあります。