Analysis of attractive purple garnets from a new deposit in central Mozambique.

Reports on an expedition to many known and new Tanzanian gem localities.

The first visual record of axinite inclusions in quartz published in the gemological literature.

Documents the retrieval and testing of P. maxima cultured pearls from a Lombok hatchery.

Analyzes the gemological and geochemical characteristics of peridot from the Gia Lai province alongside specimens from other localities to gain insight into its formation.

Testing of natural-color yellow sapphires from Australia and Thailand with the FTIR features of “Punsiri” heat-treated material.

Explores statistical data and defining characteristics of gem-quality CVD synthetic diamonds examined by GIA since 2003.

A spinel from Madagascar, mixed in with a parcel of blue sapphire, exhibited an array of internal features.

Determines whether blue zircon, inadvertently altered to brown by exposure to long-wave UV radiation, can be restored to its original color through the use of incandescent light.

Reports on exceptionally rare trapiche-patterned rhodochrosite from the famed Capillitas mine in Argentina.

Examination of pearls with a dominant purple hue, reportedly from the Spondylus calcifer mollusk.

Reports on the internal features and spectroscopic and trace-element analysis of rubies reportedly from Pokot, Kenya.

您已经听说过钻石品质的 4C 标准（颜色、净度、切工、克拉重量）。 但是它们是怎样变得如此知名的呢？一起来简要了解钻石的历史吧。

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。