Gold Bulletin

, Volume 14, Issue 4, pp 154–158 | Cite as

Touching precious metals

  • Walo Wälchli
Open Access


The technique of touching as a means of assaying gold and other precious metal alloys has been extensively used by goldsmiths for several millenia. In this article the historical origins of touching are discussed and the process, and its tools and applications today are reviewed.


Precious Metal Gold Alloy Gold Content Radiolaria White Gold 
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Copyright information

© World Gold Council 1981

Authors and Affiliations

  • Walo Wälchli
    • 1
  1. 1.Schweizerische EdelmetallkontrolleBaselSwitzerland

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