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Fall 2004, Volume 40, Issue 3

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Gem News International


DIAMONDS

  • An untreated type Ib diamond exhibiting green transmission luminescence and H2 absorption.

COLORED STONES AND ORGANIC MATERIALS

  • Gem amphiboles from Afghanistan, Pakistan, and Myanmar.
  • Hessonite from Afghanistan.
  • Interesting abalone pearls.
  • Rhodonite of facet and cabochon quality from Brazil.
  • Spessartine and almandine-spessartine from Afghanistan.
  • Gem tourmaline from Congo.

SYNTHETICS AND SIMULANTS

  • Dyed horn as an amber imitation.
  • Fake inclusions in quartz, “Made in Brazil.”

TREATMENTS

  • Dyed cultured pearls fading on exposure to heat.

MISCELLANEOUS

  • Masterpieces of American Jewelry Exhibition.

 

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