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  • Summer 1992

Summer 1992

  • $15.00
The PDF version of this issue is available at no charge. Visit www.gia.edu
Gem Wealth of Tanzania
Dona M. Dirlam, Elise B. Misiorowski, Rosemary Tozer, Karen B. Stark, and Allen M. Bassett

Gamma-Ray Spectroscopy to Measure Radioactivity in Gemstones
Charles E. Ashbaugh III

Dyed Natural Corundum as a Ruby Imitation
K. Schmetzer, H.A. H‰nni, E.P. Jegge, and F.-J. Schupp

An Update on Sumitomo Gem-Quality Synthetic Diamonds
James E. Shigley, Emmanuel Fritsch, Ilene Reinitz, and Mike Moon

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

GIA student and alumni save 10% on back issues! Enter coupon code GGALUM and a GIA Student Number at checkout.

SKU: 92su