Sale
  • Fall 1986

Fall 1986

  • $15.00
The PDF version of this issue is available at no charge. Visit www.gia.edu
A Simple Procedure to Separate Natural from Synthetic Amethyst on the Basis of Twinning
Robert Crowninghshield, Cornelius Hurlbut, and C.W. Fryer

Pink Topaz from Pakistan
Edward G¸belin, Giorgio Graziani, and A.H. Kazmi

Carbon Dioxide Fluid Inclusions As Proof of Natural-Colored Corundum
John I. Koivula

Contributions to a History of Gemology: Specific GravityóOrigins and Development of the Hydrostatic Method
John Sinkankas

Colombage-Ara Scheelite
Mahinda Gunawardene

Every issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International).

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SKU: 86f