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Winter 2002, Volume 38, Issue 4


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Gem News International


DIAMONDS

  • Kimberley Process ratified.

COLORED STONES AND ORGANIC MATERIALS

  • Alexandrite from Mananjary, Madagascar. Color-change apatite from Kazakhstan.
  • New emerald find from the Chivor region, Colombia.
  • Faceted milarite with unusual inclusions.
  • Spinel crystal with an unusual shape.
  • More tourmaline from Warner Springs, California.
  • Faceted rossmanite and other tourmalines from Nigeria.
  • Uvite tourmaline from Afghanistan

SYNTHETICS AND SIMULANTS

  • An assembled agate “nodule.”
  • A glowing manufactured gem.
  • “Rainbow Calsilica.”

TREATMENTS

  • Heat treatment experiments on faceted amber.
  • An update on Be-diffused corundum.
  • Orange topaz with synthetic hematite coating.

CONFERENCE REPORTS

  • Diamond presentations at the annual Australian Diamond Conference.
  • Antwerp Diamond Conference.
  • Antwerp Gem Conference.

IN MEMORIAM
Prof. Dr. Pieter C. Zwaan, 1928-2002

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