Presents a visual guide to the growth processes and major gemological spectroscopic features of synthetic diamonds.

Characterizes a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.

Summarizes data collected on more than 15,000 natural blue/gray/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this color range.

The first installment of G&G’s newest section explores how natural diamonds shed light on the mystery of water found in Earth’s deep mantle.

纽约州，纽约市 — 2018 年 8 月 1 日 — 著名国际科学期刊《自然》登载的封面文章中提及的新研究显示，作为最罕见的彩色钻石之一，蓝色钻石是在极端深度下形成的（约比大部分钻石深四倍）；并惊奇地发现其颜色可能由硼元素所致，这些硼元素蕴含于远古海洋层中，因构造板块运动被带到了地幔深处。

JDT program gives designer the skills and techniques – and freedom – to create the designs that move past the trends.

撞色流行趋势可见于以色域或色带闻名的多色宝石艺术色彩组合中。

2018 年春季拍卖会的闪亮之星就是洛克菲勒珠宝以及蓝色彩钻。

Review of Women Jewellery Designers by Juliet Weir-de La Rochefoucauld.

The Mogok Stone Tract of central Myanmar (Burma) is one of the world’s most famed sources of colored stones, particularly ruby, sapphire, and spinel.

赏心悦目的花园生物和花卉是最受欢迎的主题，它们被巧妙地转化成维多利亚时期、新艺术和现代的珠宝设计。

出生于非洲的有色宝石专家前往美国访问，并就此彻底改变了他的人生；找到人生挚爱，获得研究宝石学家 (GG) 文凭，开创新的事业。

A blister in a P. maxima shell, formed when the mollusk's nacre covered a trapped pearlfish, preserves the fish in stunning detail.

Two inclusions appear joined in a diamond host.

A sapphire from Pailin, Cambodia, hosts inclusions that are unusual for this material.

A selection of very small akoya cultured specimens demonstrates the challenges gemologists face when determining pearl origin.

A report on turquoise from the only known U.S. deposit outside of the Southwest.

Miriam Kamau, owner of Mimo Gems Traders Ltd. in Nairobi, transformed from an office assistant to a dealer and miner to a representative of her country on the international stage of the colored gemstone trade.