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  Home > JCE Print > Journal of Chemical Education > Issues > 2000  > October  >
Chemistry for Everyone
Applications and Analogies
A Chemical-Medical Mystery: Gold Jewelry and Black Marks on Skin
Barbara B. Kebbekus
Department of Chemical Engineering, Chemistry, and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102
Cover
October 2000
Vol. 77 No. 10
p. 1298
Abstract
Gold jewelry at times makes a black mark or smudge on skin. This may be caused by abrasive powders on the skin (e.g. zinc oxide) but the phenomenon may also be caused by other skin conditions, possibly the presence of chloride ion, acidity, or sulfur-containing amino acids. Some anecdotal evidence is published, but properly designed studies to clarify the actual causes are not available.
More Information
*  Citation
 Kebbekus, Barbara B. J. Chem. Educ. 2000 77 1298.
*  Keywords
 Bioorganic Chemistry; Geochemistry; Hormones; Metals; Solids; Gold
*  History
 Created:
Last Updated:		 September 22, 2000
April 15, 2005
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