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Summer 1991, Volume 27, Issue 2

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Gem Trade Lab Notes


AMBER, Damaged in Cleaning

DIAMOND

  • Electron-Treated, Large
  • Electron-Treated, in Period Jewelry
  • Fracture Filled
  • Green Surface-Colored Rough Fashioned to a Fancy Light Yellow
  • Green, with Radiation Stains in Etch Channels

PEARL

  • Cultured "Demi-Pearl"
  • Freshwater "Rosebud" Pearls
  • Rare Assembled Cultured Blister Pearls

An Early(?) Flux-Grown SYNTHETIC RUBY

SPINEL, with Unusual Green Fluorescence

Cobalt-Colored SYNTHETIC SPINEL, with Unusual Inclusions

Dark Blue TOPAZ Damaged by Treatment

Radioactive ZIRCON

Appears on pages 108-115

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