A detailed fluorescence analysis of pink grossular is documented for the first time.

An overview of GIA’s presentations at the annual Geological Society of America (GSA) meeting held in Denver, Colorado.

The gemological community mourns the loss of former GIA director of education and instrumental G&G contributor, Peter Keller.

Testing identifies a “red corundum” sample as red-dyed spodumene.

A diamond shaped like a cricket bat is submitted to GIA’s Mumbai laboratory.

A report on the identification of three large baroque pearls submitted to the Mumbai laboratory.

A colorless semitransparent thomsonite is examined in the Carlsbad laboratory.

The Carlsbad laboratory reports on a strand of 78 light bluish gray pearls submitted for identification.

Examination of smoky quartz from Inner Mongolia reveals rare arsenopyrite inclusions.

A variety of chalcedony from Indonesia displays a multitude of blue, green, and metallic inclusions.

Thin-film inclusions and triangle-shaped fissures are discovered in the fibrous arms of trapiche-like sapphire samples.

A laurentthomasite rough sample from Madagascar displays an abundance of hexagonal etch features.

A report on a new blue variety of amblygonite-montebrasite from Rwanda.

FTIR spectroscopy shows that the existence of carbon dioxide gas bubbles in a negative crystal in sapphire is no longer proof of the absence of heat treatment.

Black beryl beads display six-rayed and twelve-rayed stars.

Sail-shaped etch features provide proof that a sample sold as aquamarine is actually a spodumene crystal.

青金石是一种岩石，也就意味着它是多种矿物的聚晶。 这种古老的宝石包含三种矿物：天青石、方解石和黄铁矿，但各自的含量不同。 有时，它也包含以下一种或多种物质：透辉石、闪石、长石和云母。

像伟晶岩中发现的许多宝石一样，摩根石可形成大型晶体。

了解让摩根石如此受欢迎的因素。

The Alumni Collective puts GIA alums in the spotlight.