本区域发现的许多优质蓝宝石为马达加斯加东北部的自然保护和宝石开采之间的冲突开启了新的篇章。

GIA 实地宝石学家在 2013 年、2014 年和 2015 年考察过 Baw Mar 的运营。 在本次研究中，我们分析了在两个独立考察期间收集的样本。

戴比尔斯两年多来最大的周期（看货会）。 经历一年的不景气之后，奢侈品销售再度开始回升。

研究宝石学家 Rebecca Buys（丽贝卡·拜斯）是设计师兼估价师，拥有充实的事业历程，为加利福尼亚州圣地亚哥的 GIA 校友指点机遇。

设计师频繁的环球旅行为创新实验、设计灵感和社会责任奠定了基础。

In 2011, the authors began to see cases of low-quality natural pearls being used as unconventional “beads” for cultured nacre growth.

Identifies 13 copper-bearing tourmalines, which have traditionally been assumed to be elbaite species, as liddicoatite.

An examination of jadeite decorated with smaller jadeite ornaments.

Results from GIA’s recent testing of a 5.19 ct CVD synthetic diamond, the largest it has examined to date.

Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.

A rare Tasmanian trapiche-type sapphire, found during a field expedition, is examined.

Reports on a recently discovered eluvial deposit of honey yellow danburite with excellent transparency.

Describes the chemical, morphological, and microscopic properties of the first gem-quality synthetic emeralds ever produced, offering a historical perspective on their development.

Dramatic growth features are found on the surface of a titanite specimen from Russia.

The chemical composition and spectroscopic characteristics of 14 gold sheen sapphires are examined.

A turquoise bead is found to have an artificial pyrite and resin matrix.

Unusual doublets created from two different synthetics are revealed at the Carlsbad laboratory.

Provides a visual guide to the internal features of natural, synthetic, and treated emeralds.

An apatite crystal cluster, notable for its morphology and size, is found in a feldspar specimen.

Recounts an expedition to Mozambique’s important deposits of ruby, spinel, and tourmaline, which have yet to be fully explored.