Spring 1993
- $15.00
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Queensland Boulder Opal
Richard W. Wise
Update on Diffusion-Treated Corundum: Red and Other Colors
Shane F. McClure, Robert C. Kammerling, and Emmanuel Fritsch
A New Gem Beryl Locality: Luumaki Finland
Seppo I. Lahti and Kari A. Kinnunen
De Beers Near Colorless-to-Blue Experimental Gem-Quality Synthetic Diamonds
Marie-Line T. Rooney, C.M. Welbourn, James E. Shigley, Emmanuel Fritsch, and Ilene Reinitz
Richard W. Wise
Update on Diffusion-Treated Corundum: Red and Other Colors
Shane F. McClure, Robert C. Kammerling, and Emmanuel Fritsch
A New Gem Beryl Locality: Luumaki Finland
Seppo I. Lahti and Kari A. Kinnunen
De Beers Near Colorless-to-Blue Experimental Gem-Quality Synthetic Diamonds
Marie-Line T. Rooney, C.M. Welbourn, James E. Shigley, Emmanuel Fritsch, and Ilene Reinitz
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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