由于宝石和珠宝能激发力量与积极性，因此经常被用作幸运符.

在这本大书（重达 33 磅，打开时有三英尺宽）中探索神奇的钻石世界，观赏以往展览中展示钻石细节与美丽的照片库。

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。

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

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

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.

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

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.

Microscopic and chemical analysis may provide clues to the original source of Montana’s alluvial sapphires and help distinguish them from sapphires with overlapping properties.

An overview of the Winter 2015 Gems & Gemology content.

Examines the origin and nature of tarnish spots in high-purity gold and how they can be avoided.