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Summer 1997, Volume 33, Issue 2

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Gem News


DIAMONDS

  • Conference on diamond technology
  • A "piggyback" diamond assemblage
  • Synthetic diamond thin film jewelry

COLORED STONES AND ORGANIC MATERIALS

  • Color-zoned amethyst from Thunder Bay, Ontario
  • Blue- and multicolor-sheen moonstone feldspar from India
  • "Watermelon" sunstone feldspar carving
  • Musgravite: A rarity among the rare
  • Faceted cultured pearls
  • Inclusions in quartz as design elements

TREATMENTS

  • A new emerald filler

SYNTHETICS AND SIMULANTS

  • Update on vanadium-bearing synthetic chrysoberyl
  • "Cat's-eye" synthetic emerald
  • Emerald rough--buyer beware!
  • An especially misleading quench-crackled synthetic ruby
  • New information on flux-grown red spinel from Russia

 


Appears on pages 142-152

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