散发难闻气味的珍珠

虽然到目前为止，高品质的天然尖晶石无需经历大规模的处理流程，但市面上仍流通着部分经加热处理的商品。 本证书确定了经加热处理的尖晶石的识别标准。

据报道在莫桑比克北部新发现的魅力红宝石开始出现在泰国的宝石市场。 这些宝石类似于坦桑尼亚 Winza（汶沙）矿区的红宝石，但本项研究表明，可通过显微镜检查将它们区别开来。

With the use of modern tools and technology, this article sheds light on the history and provenance of both the French Blue and the Hope diamonds.

In November 2008, the Bangkok laboratory was fortunate to have an opportunity to briefly examine seven stones that the client had faceted from this parcel.

New data are presented for demantoid from Val Malenco, Italy, as obtained by classical gemological methods.

检验次生液体内含物（也被称为“指纹”）在极高温度下的状况，及其在检测热处理时发挥的作用。

During the past 25 years, the corundum market has been transformed from one of medium to high-priced gems to one that encompasses nearly all price ranges.

This article describes what is known about the Wittelsbach Blue since it was first reported in 1666, and the gemological information released to date on this diamond.

This article discusses the history and ongoing development of GIA's color grading system, and explains how its laboratory applies it.

Since late 2007, rubies and sapphires have been mined by hand methods from both eluvial and primary deposits at Winza in central Tanzania.

Aquamarine, Maxixe-type (irradiated) beryl, and two types of hydrothermally grown synthetic blue beryl currently available in the marketplace were investigated by classical gemological methods, chemical analysis, and UV-Vis-NIR and mid-IR spectroscopy.

The finest and rarest emeralds are sometimes said to have an optical effect called gota de aceite.

Seven Chocolate Pearls supplied by Ballerina Pearl Co. and 12 untreated Tahitian cultured pearls (for comparison) were exposed to conditions of consumer care and wear.

A new find of rose quartz from Madagascar contained some unusual inclusions.

Copper-bearing tourmaline from Mozambique was first recovered in 2001, but its Cu content was not recognized until 2003, and it was not widely sold with its Mozambique origin disclosed until 2005.

Modern gemologists and diamantaires are faced with a broad spectrum of color and clarity treatments ranging from the simple to the highly sophisticated.

Napoléon Bonaparte gave an extraordinary diamond necklace to his empress, Marie-Louise, in 1811.

Melee-size yellow synthetic diamonds have recently been seen in the gem market, mostly as loose stones but sometimes set in jewelry.

High-quality CVD-grown diamonds, comparable in color and clarity to natural diamonds, can be identified using a combination of gemological and spectroscopic properties.