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Color in Natural Diamonds: The Beauty of Defects

Gaillou, Eloïse and Rossman, George R. (2014) Color in Natural Diamonds: The Beauty of Defects. Rocks and Minerals, 89 (1). pp. 66-74. ISSN 0035-7529. doi:10.1080/00357529.2014.842839.

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In its pure form, diamond is colorless. However, in nature (or even when made in laboratories), diamonds are never composed of 100 percent carbon atoms. Even colorless diamonds will contain some defects: missing carbon atoms or containing trace amounts of nitrogen or hydrogen, for example. When present in certain atomic arrangements and concentrations, most minor components cause absorption of specific wavelengths of light, giving rise to color. The color in diamond is not source specific, even if some mines are known to produce more of certain colors, such as blue diamonds from the Premiere mine in South Africa, or brown and pink diamonds from the Argyle mine in Australia. Virtually every single diamond mine could produce any kind of colored diamond. At auction, record prices for gems are currently held by pink and blue diamonds: for example, $2,155,332 per carat for a 24.78-carat Fancy vivid pink diamond (sold at Sotheby's in 2010) and $1.8 million per carat for a 5.3-carat Fancy deep blue diamond (sold at Bonhams in London in April 2013).

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Rossman, George R.0000-0002-4571-6884
Additional Information:© 2014 Taylor & Francis. Published online: 09 Dec 2013. We thank Drs. Robert Cook and John Rakovan for reviewing the manuscript for this article.
Issue or Number:1
Record Number:CaltechAUTHORS:20180501-080712560
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Official Citation:Eloïse Gaillou & George R. Rossman (2013) Color in Natural Diamonds: The Beauty of Defects, Rocks & Minerals, 89:1, 66-75, DOI: 10.1080/00357529.2014.842839
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86147
Deposited By: Tony Diaz
Deposited On:01 May 2018 18:18
Last Modified:15 Nov 2021 20:35

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