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Abstracts; Winter 1991
This article, from the Winter 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.
Exhibition Review: Glitterati: Portraits and Jewelry from Colonial Latin America
Screening of Mounted Melee Using the GIA iD100
GIA’s new screening device accurately identifies an HPHT-grown melee diamond.
Revolution in Diamond Cutting: Laser Sawing of Diamond Crystals
This article describes the components and operation of the laser saw and its usefulness in diamond cutting.
A Report on the New Watermeyer Split-Facet Diamond Cuts
Introducing a new technique in diamond cutting that virtually eliminates the
Unusual Dumbbell-Like Inclusion in Diamond
Examination of a 0.40 ct near-colorless round brilliant diamond with a large inclusion resembling a dumbbell
Two Near-Colorless General Electric Type-IIA Synthetic Diamond Crystals
Gemological examination of two near-colorless, isotopically pure, carbon-12 synthetic diamonds grown recently by General Electric reveals short-wave ultraviolet luminescence behavior, a cathodoluminescence pattern, and small metallic inclusions that are typical of other gem-quality synthetic diamonds.
An Update on Filled Diamonds: Identification and Durability
This report focuses on recent products from Yehuda/Diascience, Koss & Schecter Diamonds (Genesis II), and Clarity Enhanced Diamond House (a subsidiary of Goldman Oved Diamond Co.).
An Era of Sweeping Change in Diamond and Colored Stone Production Markets
The diamond, colored stone, and pearl businesses have witnessed unprecedented change since the turn of the 21st century.
Exploring the Origin and Nature of Luminescent Regions in CVD Synthetic Diamond
In the DiamondView instrument, blue to blue-green luminescent zones may be seen in CVD synthetic diamond when the growth run has been interrupted and resumed.
A History of Diamonds through Philately: The Frank Friedman Collection
South African jeweler Frank Friedman’s collection of diamond-themed stamps and other postal material offers an illuminating visual record of diamond history.
Diamond Laser
Overview and commentary on the 2014 Optics & Photonics News article “Diamond Raman Lasers.”
