Geology and Development of the Lomonosov Deposit, North-Western Russia
Reviews diamond discoveries at the Lomonosov deposit, as well as the geology of the Arkhangelsk kimberlite province.
Optical defects in diamond: a quick reference chart
A simple chart of optical defects in diamond, including those that produce colouration and fluorescence colours.
Fluorescence produced by optical defects in diamond: measurement, characterisation and challenges
How variations in UV lamp output can affect observed fluorescence colour and intensity.
Fluorescence Spectra of Coloured Diamonds Using a Rapid, Mobile Spectrometer
Numerous natural-colour coloured diamonds from the Aurora Butterfly of Peace and other collections were studied using a new type of fluorescence spectrometer.
The Wittelsbach Blue
This article describes what is known about the Wittelsbach Blue since it was first reported in 1666, and the gemmological information released to date on this diamond.
Winter 2011 G&G Lab Notes
This section, from the Winter 2011 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Grey-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia
The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds coloured grey to blue to violet.
Pink Diamonds from Australia
The author reports on a sudden influx of natural fancy pink diamonds and their origins.
Possible “Sister” Stones of the Hope Diamond
A recent study compares a specially created model of the Hope diamond with recent computer models of the French Blue to determine if other stones could have resulted from either recutting.
Strongly Coloured Pink CVD Lab-Grown Diamonds
Pink CVD lab-grown products can be separated from natural and treated-colour natural pink diamonds by a combination of gemmological and spectroscopic properties, which are explored in this study.