An eye-visible cloud with a star-like pattern is highlighted by the cut of the Rare Sun diamond.

Minute platy magnetite inclusions in these emeralds from Pakistan could help advance our understanding of trapiche.

Nigerian aquamarine with exceptionally deep and saturated color also displays unusually strong pleochroism.

Artificial glass, a low-cost material, is capable of simulating any gemstone owing to its range of appearances (bodycolor, transparency, and phenomena).

Recently, a 2.05 ct blue sapphire was sent to Guild Gem Laboratories for identification.

The 2019 AGTA show in Tucson featured the work of a gemstone portrait artist.

A look at the gem ornamentation of this landmark, as well as the jewels of the Mughal dynasty.

Determines methods for maximizing production and quality of cultured half-pearls.

Characterization of an intense yellowish green faceted diamond revealed a complex treatment process.

Identifies mineral inclusions in corundum from this locality for comparison with other global deposits.

Spectroscopic and chemical analyses of emeralds from this Chinese deposit show a unique composition.

Examines a new rhodochrosite simulant composed of pressed gibbsite and calcite powder.

A systematic study of the properties of approximately 500 Fancy white and 1,200 Fancy black diamonds.

Reveals the process for hydrothermal enhancement of amber and the means of detection.

Fine merelaniite whiskers discovered in gem-quality yellow-green diopside crystals.

Research topics covering diamonds and colored stones were presented at the annual meeting of the Geological Society of America in Phoenix, Arizona.

这一系列珠宝图片说明了金属加工技术如何展示宝石和珠宝设计。

关于墨西哥科尔特斯海珍珠的加注读物清单

一组 GIA 毕业生分享他们在宝石和珠宝行业中的不同职业道路选择，并且为学员提供建议。

GIA 研究人员通过分析 90,000 多颗天然粉红色钻石，来更好地理解这种稀有而美丽的钻石的形成原因和颜色成因。