• Spring 1993

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: Luum‰ki, 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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