Recent Advances in Understanding the Geology of Diamonds
Examines the last two decades’ advances in analyzing and understanding the formation of natural diamonds, and their relation to the earth’s formation.
Gemological Characteristics of Coated Jadeite Jade
Analyzes the effects of coating on green jadeite specimens using DiamondView imaging, microscopy, spectroscopy, and Raman spectrophotometry.
Books: Fashion Jewellery: Made In Italy
In piecing together this treasure trove of signature Italian style, the book brings readers closer to understanding the appeal and artistry of jewelry making beyond that which is traditionally associated with fine jewelry.
Looking Ahead to 2014
G&G recognizes the innovations and milestones of 2013 as we move into our 80th year of publication.
Composite Amber with an Unusual Structure
This 9.12 gram amber composite featured a combination of natural and imitation amber, accompanied by natural and artificial insect inclusions.
Demantoid Garnet Fossil Pseudomorphs
In these two extremely rare specimens, demantoid garnet replaced coral and gastropod fossils.
“Gran Dama” Brooch Featuring Large Melo Pearl
The centerpiece of this brooch is a 98.67 ct Melo pearl, believed to be one of the world's largest.
Stellate Zircon Inclusions in Vivid Purple-Pink Morganite
Zircon clusters and other inclusions help to create an unusual vivid purple-pink morganite specimen.
Titanium-Bearing Synthetic Alexandrite and Chrysoberyl
Overview and commentary on the 2013 Journal of Gemmology article “Titanium-Bearing Synthetic Alexandrite and Chrysoberyl.”
Greenish Blue Spodumene
The unusual greenish blue color of this spodumene was the product of irradiation.
Scheelite and Hübnerite Inclusions in Quartz from China
A quartz specimen collected from China's Hunan province contained inclusions of scheelite and hübnerite.
越南陆克彦宝石矿更新 (英语)
Explores the emergence of the Luc Yen area as a producer of corundum, spinel, tourmaline, and other colored stones.
产自摩谷 Baw Mar 矿的蓝色蓝宝石 (英语)
Reports on the microscopic, chemical, and spectroscopic features that differentiate the high-quality Baw Mar sapphire from “classic” gem-quality Burmese sapphire.
Ammolite: An Organic Jewel
Overview and commentary on the June 2013 Rock & Gem article, “Ammolite: An Organic Jewel.”
21st-Century Jewellery Designers
Juliet Weir-de La Rochefoucauld's book presents a selection of international contemporary jewelry designers.
Faceted Wurtzite from Tanzania
The rarity and value of faceted wurtzites from Tanzania are sure to draw the attention of gem collectors.
Bright Yellow Diamonds from Sierra Leone
Examination of strongly yellow diamonds from the Zimmi area of Sierra Leone revealed graphitized feather inclusions.
Black Diamond with Unusual Color Origin
This black diamond's color was produced by natural radiation stains, an unusual cause of color.
Silicon in Natural Type IIa and Type IaB Diamond
Silicon, normally associated with CVD synthetic diamond, may be found in natural diamond.
Large Synthetic Moissanite with Silicon Carbide Polytypes
Examination of the properties of a synthetic moissanite specimen submitted as a black diamond.
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