Chameleon Diamond with Nickel Absorption Band
Troy Ardon, July 25, 2014
A rare chameleon diamond is examined in GIA's Carlsbad lab.
A Gemmological Study of a Collection of Chameleon Diamonds
Thomas Hainschwang, Dusan Simic, March 1, 2005
Chameleon diamonds are among the rarest of gem diamonds.
Uncommon Parallel Colour Zoning in a Chameleon Diamond
Hollie McBride, August 9, 2018
A diamond examined in the Carlsbad lab shows chameleon colouring in an unusual pattern.
Cape Diamond with Yellow Phosphorescence
Kyaw Soe Moe, Jon Neal, and Paul Johnson, May 8, 2017
A cape diamond examined in the New York lab shows rare yellow phosphorescence.
The Foxfire Diamond, Revisited
James E. Butler, Jeffrey E. Post, and Wuyi Wang, January 26, 2018
The 187.63 ct rough diamond from Canada’s Diavik mine shows surprising reactions to ultraviolet light.
Exhibition Review: Green Diamonds: Natural Radiance
Jennifer-Lynn Archuleta, March 15, 2018
Review of Green Diamonds: Natural Radiance at the Natural History Museum of Los Angeles.
Two Natural Type IIa Diamonds with Strong Phosphorescence and Ni-Related Defects
Shi Tang, Zhonghua Song, Taijin Lu, Jun Su, and Yongwang Ma, January 26, 2018
Natural diamonds exhibit characteristics normally seen in synthetic material.
Fluorescence Spectra of Coloured Diamonds Using a Rapid, Mobile Spectrometer
Sally Eaton-Magaña, Jeffrey E. Post, Peter J. Heaney, Roy A. Walters, Christopher M. Breeding, and James E. Butler
Numerous natural-colour coloured diamonds from the Aurora Butterfly of Peace and other collections were studied using a new type of fluorescence spectrometer.
Natural-Colour Blue, Grey and Violet Diamonds: Allure of the Deep
Sally Eaton-Magaña, Christopher M. Breeding, and James E. Shigley, August 6, 2018
Summarises data collected on more than 15,000 natural blue/grey/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this colour range.
Black Diamonds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite Inclusions
Karen V. Smit, Elina Myagkaya, Stephanie Persaud, and Wuyi Wang, August 6, 2018
Characterises a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.