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Gold Bulletin

, Volume 22, Issue 2, pp 42–47 | Cite as

Polishing compound residues in gold jewellery alloys

  • Helen Royal
Open Access
Article
  • 605 Downloads

Abstract

The assaying of gold jewellery before hallmarking is generally carried out on samples scraped from the surface. But the assay result may not necessarily be representative of the bulk composition. Analyses reported here have shown the presence of polishing compound residues on, and just below, the surface of some of the jewellery tested.

Keywords

German Origin Gold Sample French Origin Gold Jewellery White Gold 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    P.V.A. Johnson,Proc. 2nd Int. Sem. Sampling and Assaying of Precious Metals, IPMI, 1980, 146–157Google Scholar
  2. 2.
    D.K. Bowen and C.R. Hall,Microscopy of Materials, Macmillan, 1975Google Scholar
  3. 3.
    M.J. Southon and M.C. Witt,Vacuum, 1984,34, 903–909CrossRefGoogle Scholar
  4. 4.
    L.E. Samuels,Metallographic Polishing by Mechanical Methods, Pitman, 1967Google Scholar

Copyright information

© World Gold Council 1989

Authors and Affiliations

  • Helen Royal
    • 1
  1. 1.Department of Materials and MetallurgyUniversity of CambridgeCambridgeUK

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