A report on how high-profile jewelry auctions have affected the gem and jewelry market.

了解更多被评为“2013 JCK 璀璨新星”的 GIA 毕业生 Mary Kay 和 Patrick Mohs 的故事。

CVD 工艺与天然钻石的形成有极大的差异。 在充满烃气体（通常是甲烷）和氢气的热混合气体的真空室中，施加极低压力，于是产生了钻石。

曼谷可能是泰国宝石产业的金融中心，但产业心脏位于尖竹汶府，大部分宝石仍在此切磨。

从以下方面探讨这一技术的有用性：缺陷和光谱特征映射，色彩来源的确定，以及如何鉴别合成钻石和经处理的小钻石。

A study on how infrared spectroscopy provides conclusive evidence of impregnated moonstone.

学员们学习高科技制造和生产工具来设计和制作珠宝

The gemological and spectroscopic characteristics of these type IIa synthetic diamonds suggested that they experienced different growth and/or treatment histories.

The New York laboratory recently tested a 2.16 ct CVD synthetic from Scio Diamond Technology Corp., the largest specimen GIA has seen so far.

Recently, an unusual 0.94 ct Fancy yellow-brown emerald cut was submitted to GIA for a synthetic diamond grading report. It contained a cloud of black needle-like inclusions occurring along a plane and showed weak green transmission with fiber-optic illumination.

In mid-2012, one of the international diamond grading laboratories in Antwerp reported undisclosed CVD synthetic diamonds, causing a stir in the diamond industry.

At the AGTA show, Equatorian Imports showed this contributor two pieces of emerald with a very rare double-trapiche pattern

The Gem Testing Laboratory of Jaipur, India, received for identification an opaque blue specimen, submitted as sapphire.

Two small, near-colorless stones reportedly from Myanmar were loaned to GIA for examination.

Deep blue apatite with a cat’s-eye effect, however, is very rare.

The stone owes all of its green color to these shallow radiation stains.