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N.R. Barot and Edward W. Boehm
Kilbourne Hole Peridot
John R. Fuhrbach
Opal from QuerÈtaro, Mexico: Fluid Inclusion Study
Ronald J. Spencer, Alfred A. Levinson, and John I. Koivula
Natural-Color Nonconductive Gray-to-Blue Diamonds
Emmanuel Fritsch and Kenneth Scarratt
Peridot as an Interplanetary Gemstone
John Sinkankas, John I. Koivula, and Gerhard Becker
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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