加入 GIA 的蒙大纳州野外远征队，让我们带您去蓝宝石矿山，在那里，您可以发现矿区的天然之美，看到强烈的个人主义者在那里开矿。

GIA 的一个团队周游世界去发掘记录有色宝石从矿场到市场的过程中所发生的故事。

情人节珠宝和宝石

印度斋浦尔是全球宝石和珠宝行业重要的祖母绿切割和交易中心。 跟随 GIA 实地考察团队一起探访整个行业，了解公众或业内大部分成员都很难得见到的一家企业内部的错综复杂。

Documents a trip to the renowned opal fields of Lightning Ridge, Koroit, Yowah, and Quilpie.

Archival research and gemological characterization reveal the true story of this 135.74 ct blue sapphire from the French crown jewels.

This type of pink pyrope garnet, believed to have been mined in Tanzania, shows a distinct color-change phenomenon resulting from its unique chemical composition.

Rare material from Brazil features four-ray stars under point-source light.

A report from the 34th IGC, held in Vilnius, Lithuania in August 2015.

A large fluid inclusion within a demantoid garnet from Madagascar provides insight into the source’s mineralization.

An unfamiliar rough fragment acquired from Madagascar may point toward a new source of grandidierite.

A new type of African chalcedony with the trade name “Aquaprase” shows unique composition and attractive color.

Two blister pearls attached to a host shell believed to have fossilized during the later Pleistocene period and discovered in southeastern Kenya are studied.

A semi-baroque pearl with an unusual radial feature is submitted to the Bangkok lab for testing.

An inclusion outlined by minute graphite crystals within a diamond create an octahedral shape.

Two near-colorless rounds, weighing 3.23 and 2.51 ct, were the largest CVD-grown synthetic diamonds GIA has examined.

The fluorescence of hyalite from Zacatecas, Mexico is examined and compared to material from other locations in GIA’s Tokyo lab.

A Mexican fire agate cabochon’s coloration and structure combines to create an unusual visual effect.

Rare material found as inclusions in quartz is thought to have formed simultaneously with the host.

Under magnification, a round brilliant diamond features a pyrope garnet inclusion in an aesthetically pleasing shape.