Article published in Precambrian Research 286, 152-166.

天然珍珠鉴定是珍珠研究的关键问题之一。 珍珠类软体动物和牡蛎的 DNA 研究有助于解决这一问题。 为实现此目标，GIA 派遣一支由科研和教育专业人员组成的队伍前往田纳西州，对淡水软体动物进行采样，以便用于 DNA 条形编码。 与我们一起前往田纳西州的卡姆登，看看我们如何潜水采集珍珠类贝壳。

和 GIA 的实地宝石学家一起寻找越南充满异域风情的天蓝色尖晶石。

壮观的罗曼诺夫王朝宝石与珠宝收藏记录在《俄罗斯钻石和宝石珍藏》中，该书是少数尚存的记录皇室珠宝的目录之一。

Lightning Ridge（闪电山脊）是全球优质黑蛋白石之都，这种蛋白石是人们最梦寐以求的一种。 2015 年 6 月，一群 GIA 实地宝石学家参观了澳大利亚新南威尔士的这个传奇小镇。 和我们一起探索这个重要的蛋白石产地吧。

Emerging artist Trishala Ashok – who has won multiple design awards – looks beyond the mundane and minutiae of daily life to create her jewelry.

与 GIA 实地考察队一同参观蒙大纳州岩溪蓝宝石矿业地区，见证直接从产地采收的精美宝石。

Located near the Arctic Circle, Diavik is one of the world’s richest diamond deposits and a leader in sustainable mining.

Boulder opal in sandstone matrix is seen as beads in Tucson.

Testing identifies a new treatment method as the cause of color in beeswax amber.

Master cutter Kiwon Jang demonstrates his newest cutting machine at Tucson’s AGTA show.

A first-person account of cutting a 3,019 ct piece of white opal to create a 1,040 ct gem with play-of-color across the surface.

Hardstone figures of two Russian imperial bodyguards, commissioned in 1912 by Nicholas II, demonstrate the House of Fabergé’s meticulous detail and craftsmanship.

A quartz double cabochon showcases a garnet placed to imitate an inclusion.

The first triplite inclusion in a topaz host is examined.

Sapphires from Russia’s Ilmen State Reserve may provide insight into gem corundum from secondary placers.

Inclusions in technogenic ruby slag help to separate this material from other specimens, both natural and synthetic.

Blisters examined in the Bangkok lab have been treated with an artificial filler.