Dual-Color Double Stars in Ruby, Sapphire, and Quartz: Cause and Historical Account
Karl Schmetzer, Martin P. Steinbach, H. Albert Gilg, and Andrea R. Blake
Digital Photomicrography for Gemologists
Rubies and Sapphires from Snezhnoe, Tajikistan
Elena S. Sorokina, Andrey K. Litvinenko, Wolfgang Hofmeister, Tobias Hager, Dorrit E. Jacob, and Zamoniddin Z. Nasriddinov
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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