Lost treasures.

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  • Author(s): Coghlan, Andy
  • Source:
    New Scientist. 02/05/2000, Vol. 165 Issue 2224, p14. 1/2p. 1 Color Photograph.
  • Additional Information
    • Subject Terms:
      EMERALDS; GEOCHEMISTS; OXYGEN; GEMS & precious stones; ANALYTICAL chemistry; MEASUREMENT
    • Abstract:
      Reports that French and Colombian geochemists can determine the origins of emeralds by analyzing their oxygen levels. Why the origin of old mine emeralds sold by Indian traders in the 16th century has been a mystery; How examining oxygen proportions allowed the geochemists to determine that they had come from old mines in Asia; Plans to use the technique on rubies and sapphires