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Cuprian Liddicoatite Tourmaline

Yusuke Katsurada and Ziyin Sun, May 8, 2017

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

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Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

Russell Shor, February 1, 2016

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

Multicoloured Bismuth-bearing Tourmaline from Lundazi, Zambia

Mary L. Johnson, Cheryl Y. Wentzell, September 1, 1997

Tourmalines from an alluvial deposit near Lundazi in Zambia consist of colour-zoned pink/colourless/yellow-green “watermelon” nodules.

Copper-bearing (Paraíba-type) tourmaline from Mozambique

Brendan M. Laurs, et al.

Copper-bearing tourmaline from Mozambique was first recovered in 2001, but its Cu content was not recognised until 2003.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Winter 2009

Brendan M. Laurs, Thomas W. Overton

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

Spectral Differentiation Between Copper and Iron Colourants in Gem Tourmalines

Paul B. Merkel and Christopher M. Breeding

The authors used Vis-NIR spectral measurements combined with LA-ICP-MS data to investigate the usefulness of absorption spectra.

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