Gem News International Gems & Gemology, Spring 1989, Volume 25, No. 1

Spring 1989 Gem News International

Tucson ‘89
            Man-Made "Inclusion" Specimens
            Mother-of-Pearl Gambling Chips
            Plastic Cameo Imitations
            Synthetic Quartz
            Tourmaline from Nigeria
Colored Stones
            A Beautiful New Form of Orthoclase
            New Emerald Deposit near Nova Era, Brazil
            Record-Size Spessartine Garnet
            Star Almandine Garnet from Idaho
            Wollastonite for Carving
            New Developments in Spectroscopy
Synthetics and Simulants
            Recent Advances in Gem Diamond Synthesis
            Synthetic Diamonds by Detonation
            Synthetic Diamond vs. Cubic Zirconia
            Emerald Imitation from Quartz
            Heat-Treated Lepidolite?
            Imitations from Africa
            "Reconstructed" Azurite-Malachite
            Synthetic Amethyst Alert
            Mr. Francisco Muller Bastos: 1988 G&G Challenge
In Memoriam
            Irwin Moed 1918-1988