Article Search Results

True Colours of “Dalmatian Jasper”

Tomasz Powolny and Magdalena Dumańska-Słowik, November 8, 2017

Discusses the mineralogical composition and provenance of this spotted decorative gemstone.

Characterisation of Peridot from Sardinia, Italy

Ilaria Adamo, Rosangela Bocchio, Alessandro Pavese, and Loredana Prosperi

Gem-quality peridot is occasionally found as mantle xenoliths within basalts near Pozzomaggiore.

Grey-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia

Carolyn H. van der Bogert, Christopher P. Smith, Thomas Hainschwang, and Shane F. McClure

The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds coloured grey to blue to violet.

Solution-Generated Pink Colour Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique

John I. Koivula, Kevin Nagle, Andy Hsi-Tien Shen, and Philip Owens

Several transparent, faceted, blue to blue-green copper-bearing tourmalines containing growth tubes and cracks surrounded by sleeves of pink colour were examined for this report.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Summer 2009

Brendan M. Laurs, Thomas W. Overton

This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

Hackmanite/Sodalite from Myanmar and Afghanistan

David Kondo and Donna Beaton

Significant amounts of gem-quality sodalite/hackmanite—some unusually transparent—have been produced.

Star of the South: A Historic 128 Ct Diamond

Christopher P. Smith and George Bosshart, March 1, 2002

This article presents the first complete gemmological characterisation of the historic 128.48 ct Brazilian diamond known as the Star of the South.

Rubies and Fancy Sapphires from Vietnam

Robert E. Kane, Shane F. McClure, September 1, 1991

Gem-quality rubies and pink to purple sapphires are being recovered from the Luc Yen and Quy Chau mining regions of Vietnam.

A Survey of the Gemstone Resources of China

Peter C. Keller and Wang Fuquan, March 1, 1986

China has identified many deposits with significant potential to produce gemstones; various species are discussed.

Reflectance Infrared Spectroscopy in Gemmology

F. Martin, H. Merigoux, and P. Zecchini, December 1, 1989

External reflectance infrared spectroscopy permits a very rapid and nondestructive determination of the species of a mineral.

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