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Summer 1998, Volume 34, Issue 2

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Gem Trade Lab Notes


  • CALCITE, Colored by Inclusions
  • CORUNDUM, Diffusion Treated
  • DIAMOND
  • Colored by Pink Coating With Different Color Appearances Depending on Viewing Location
  • Manufactured GLASS, Represented as 'Green Obsidian'
  • PEARLS
  • Cultured, with Dolomite Beads
  • Cultured, with Treated Black Color
  • QUARTZITE, Dyed to Imitate Sugilite
  • An Unusual SAPPHIRINE

Editors:
Thomas Moses, Ilene Reinitz, Shane F. McClure - GIA Gem Trade Laboratory

 

Contributing Editors:
G. Robert Crowningshield - GIA Gem Trade Laboratory, East Coast
Karin Hurwit - GIA Gem Trade Laboratory, West Coast
Mary L. Johnson - GIA Gem Trade Laboratory, West Coast
Cheryl Y. Wentzell - GIA Gem Trade Laboratory, West Coast



Appears on pages 127-133

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