Plans to develop a collective in a remote Brazilian rutilated quartz mining community are unveiled.

The recession of 2008 transforms a gem business into a vertically integrated operation.

An overview of the trends reported at the 2017 Tucson gem shows.

A color change in rough garnet is observed and plotted in GIA’s Carlsbad lab.

GIA examines a multi-elemental diffused and melt-grown synthetic sapphire for the first time.

A sapphire with a color not commonly seen in the lab is found to have a glass filling.

Quality assurance testing in the Bangkok lab reveals HPHT synthetic melee in larger sizes.

Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.

Imitation pearls show kaleidoscopic colors with illumination.

A topaz hosting a group of inclusions is examined in the Carlsbad lab.

A look at the 2016 sapphire production from Montana’s Rock Creek deposit.

A family sources, designs, and carves gems for extraordinary jewelry and pieces.

Three mineral species, not previously seen in the Carlsbad lab, are examined.

豊富な媒体とインタラクティブなこのプログラムを通して、GIAの卒業生は宝石やジュエリーに関する最新のニュースや情報に通ずることが可能になります。

GIA同窓会は、参加者全員に対し、様々な教育、ネットワーキング、そして楽しいイベントを提供しています。

Revere Academy（リビア・アカデミー）主催2016年タヒチ産真珠ジュエリーデザインコンテストで優勝に輝いた、GIAのJDTプログラムの卒業生が、彼女の家族のジュエリーの遺産を蘇らせます。

Sapphires from Baw Mar host multiphase inclusions in appealing patterns.

A review of Gem: The Definitive Visual Guide.

Considers the previously unreported but critical impact of silicon on the coloration of gem-quality sapphire.

ペンリン島で採取された4つのミドリアオリ養殖ブリスター パールに関する研究。