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Winter 1993, Volume 29, Issue 4

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Gem News


COLORED STONES

  • Update on Colombian emerald mining
  • Vietnamese garnets
  • Myanmar mid-year Emporium
  • Update on Monghsu ruby
  • Ruby in kyanite from India
  • Rare gemstones from Quebec
  • Attractive ornamental marble
  • Thai-Myanmar jewelry manufacturing joint venture

ENHANCEMENTS

  • Irradiated phenomenal quartz

SYNTHETICS AND SIMULANTS

  • Amber simulant from India
  • Artificial glass with high R.I. and S.G.
  • More on Vietnamese deceptions

THE 24TH INTERNATIONAL GEMMOLOGICAL CONFERENCE

DIAMONDS

  • Canada
  • India
  • Green-to-blue diamonds
  • History of diamond cutting

COLORED STONES AND ORGANIC MATERIALS

  • Amphiboles
  • Beryl
  • Charoite
  • Corundum
  • Garnet
  • Meteorites with gems
  • Natural glass
  • Opal
  • Porcelaneous "pearls"
  • Quartz

SYNTHETICS

  • Early synthetics
  • Russian synthetics
  • Douros flux-grown synthetic ruby

MISCELLANEOUS



Appears on pages 285-296

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